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Computer Manufacturers Database
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Logo |
Manufacturer
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Models |
Origin |
Est. |
Ended |
Production |
Type |
Info 1 |
Info 2 |
| T | |||||||||
 | T-Chip Technology Co., Ltd. (Firefly) | 2 models | CHN | 2005 | act. | 00's - 10's | PC | - |  |
| T-DATA | PC comp., (+6) | ? | - | (†) | 90's | PC | - | - | |
T-Effect Electronic Co., Ltd.
 | PC comp. | TWN | 2009 | act. | 00's - 10's | PC | - |  | |
 | T-Mobile International AG | GER | 1990 | act. | 10's | PC | - | | |
 | T-Platforms | 4 models | RUS | 2002 | † | 00's | SU |  | |
 | T-Zone Strategy Corp. | PC comp., (+6) | JAP | 1975 | 2010† | 00's | PC | - | |
 |
T. Aihara
| Babbage-2nd, (+3) | JAP | - | † | 80's | PC | - | |
|
T.D.S Electronic Technology Co., Ltd.
| CHN | 2011 | act. | 10's | PC | - | | ||
 | T.S. Microtech, Inc. | SBC | USA | 1983 | † | 90's | PC | - | |
| T.V.S. | Compact-128 | RUS | - | (†) | 90's | PC | - | | |
| T.W. Computer | PC comp. | USA | - | (†) | 80's | PC | - | - | |
 | T&T (div. NSI) | PC comp., (+13) | TWN | - | † | 90's | PC | - | |
 | T3 Technologies, Inc. | 12 models | USA | 1992 | † | 90's - 00's | MF | | - |
 | TAB Products Co. | 12 models | USA | 1949 | act. | 80's - 00's | PC, MC, TER | | |
| Table Top Systems | AC-85 | AUS | - | † | 80's | PC | - | | |
 | TabletKiosk
| 2 models | USA | 1993 | act. | 90's - 00's | PC | - | |
 | Tactronics Holdings, LLC | PC comp. | USA | 1993 | † | 00's | PC | - | |
 | Tad Gruber Consulting AB | SWE | - | (†) | 80's | TER | - | | |
 |
Tadpole Technology, Inc.
| SPARC clone, (+31) | USA | - | 2005† | 90's - 00's | PC | | |
 | Tadpole-RDI Corp.
| SPARC clone | USA | 1998 | 2005† | 90's | PC | - | - |
 | Tag PC Technology Ltd. | PC comp., (+8) | UK | - | † | 90's | PC | - | |
 | Taganrog Radio Electronics Institute (TAGREI) | TAGREI, (+2) | RUS | - | (†) | 80's | SC | - | - |
 | Tagram System Corp. | PC comp., (+36) | USA | 1993 | † | 90's | PC | | |
 | Taicenn Technology Co., Ltd. | CHN | 2016 | act. | 10's - 20's | PC | - | | |
 | Taihan Electric Wire Co., Ltd. | KOR | 1955 | act. | 80's | PC | - | | |
| Taiwan Australia Trade & Commercial Center | PC comp. | AUS | - | † | 80's | PC | - | | |
| Taiwan Hwan Hong Enterprise Co. | 1 models | TWN | - | † | 80's | PC | - | | |
| Taiwan International Standard Electronics Ltd.
| TWN | 1973 | act. | 90's | PC | - | - | ||
 | Taiwan Jantek Electronics, Inc. | PC comp. | TWN | 1990 | (†) | 90's | PC | - | |
| Taiwan Machine Trading Co. (TMT) | 1 models | TWN | - | † | 80's | PC | - | - | |
 | Taiwan Mycomp Co., Ltd. (TMC) | SBC | TWN | 1983 | † | 90's | PC | - | |
| Taiwan Tomorrowland Inc. | PC comp. | TWN | - | † | 80's | PC | - | | |
 | Takachiho Koheki Co., Ltd. | TK, (+2) | JAP | 1952 | act. | 70's | MC | | |
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Takagi Industrial Co., Ltd.
| Purpose, (+2) | JAP | 1952 | 2011† | 90's | PC | - | - |
 | Takaoka Electric Mfg. Co., Ltd. | MSX, (+13) | JAP | 1918 | act. | 80's | PC, TER | - | |
| Takapana Investments Pty Ltd. | PC comp., (+5) | AUS | 1984 | (†) | 90's | PC | - | | |
 | Takara Toys Co., Ltd.
| M5 | JAP | 1955 | 2006† | 80's | PC | - |  |
| Tal-Star Computer Systems, Inc.
| USA | - | † | 70's | MC | - | | ||
| Talbott Corp. | PC comp., (+7) | USA | - | (†) | 80's | PC | - | | |
| Talcom Benelux BV | PC comp. | HOL | 1990 | † | 90's | PC | - | | |
 | Talent Grant Tech, Inc. (TG-TEK) | USA | 2013 | act. | 10's | PC | - | | |
 | Talent/Telematica | MSX, (+9) | ARG | - | † | 80's | PC | - | |
 | Talius Technology S.L. | SPA | 2010 | act. | 10's | PC | | | |
 | Talking Electronics | TEC-1, MicroComp, (+2) | AUS | 1981 | 1989† | 80's | PC | | |
| Talkto Computers, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Talla-com Industries, Inc. | USA | 1998 | † | 00's | PC | - | | |
 |
Tallinna Elektrotehnika Tehas AS (ESTEL)
| Viker | RUS | 1870 | act. | 90's | PC | | |
 | Tally Corp.
| 6 models | USA | 1951 | 1979† | 60's - 70's | TER | - | |
 | Talos Systems, Inc. | USA | 1974 | † | 80's | TER | - | - | |
 | Taltek Electronics Ltd. | Pass-Port | CAN | - | (†) | 80's | PC | - | |
 | Tamtron Group | FIN | 1972 | act. | 00's - 10's | PC | - | | |
 | Tandata | 2 models | UK | - | † | 80's | PC, TER | - | |
 | Tandberg Data | 37 models | NOR | 1979 | † | 80's - 90's | PC, TER | | |
 |
Tandem Computers, Inc.
| 173 models | USA | 1974 | 1996† | 60's - 90's | MF, MC, PC,TER | | |
| TandemDirect (-> Tandem) | USA | - | (†) | 90's | PC | - | | ||
 | Tandex Technologies, Inc. | PC comp., (+39) | CAN | - | 2004† | 90's | PC | - | |
 | Tandon Corp. | 93 models | GER | 1978 | act. | 80's | PC | | |
| Tandy by AST (-> Tandy) | PC comp. | USA | 1993 | † | 90's | PC | - | | |
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Tandy Corp.
| 139 models | USA | 1919 | act. | 80's - 90's | PC, TER | | |
| Tandy Grid Europe
| USA | 1992 | † | 90's | PC | - | - | ||
 | Tangent Computer, Inc. | 112 models | USA | 1988 | act. | 90's - 00's | PC | - | |
 | Tangent Solution Co., Ltd. | PC comp. | TWN | - | act. | 00's | PC | - | |
 | Tangerine Computer Systems Ltd.
| Oric, Microtan, (+5) | UK | 1979 | † | 80's | PC | | |
 | Tango Tech, Inc. | Tango PC | USA | 2012 | † | 10's | PC | - | |
 |
Tano Corp.
| AVT2, Outpost, Dragon, (+6) | USA | 1968 | † | 70's - 80's | PC, TER | - | |
 | Tapwave, Inc. | Zodiac | USA | 2001 | 2010† | 00's | PC | | |
 | Taran Microsystems Ltd. | PC comp. | UK | 1992 | † | 00's | PC | | |
 | Tarbell Electronics | 3 models | USA | 1976 | (†) | 80's | PC | - | |
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Targa GmbH (div. Actebis)
| Tidalwave clone, (+139) | GER | 1991 | act. | 90's | PC | | |
 | Target USA, Inc. | PC comp. | USA | - | † | 00's | PC | | |
| Targetek, Inc. | PC comp. | TWN | 1992 | (†) | 90's | PC | - | | |
| Tarot Electronics | MIMIC | CAN | - | † | 70's | PC | | | |
 | TAROX Systems & Services GmbH | GER | - | act. | 00's - 20's | PC | - | | |
| Tartan Computers | PC comp. | USA | - | † | 90's | PC | - | | |
| Tashki Computer System | OM 8064 | UK | - | † | 80's | PC | - | | |
 | Task | PC comp. | CZE | - | act. | 00's | PC | - | - |
| Task IT | PC comp., (+2) | UK | - | † | 00's | PC | - | | |
 | Tasker Instruments Corp. | 5 models | USA | - | † | 60's | TER | - | - |
 | Taskit GmbH | GER | 1988 | act. | 90's - 10's | PC | - | | |
| Tata Burroughs Ltd.
| IND | 1977 | † | 70's | PC | - | - | ||
 | Tata Consultancy Services (TCS) | IND | 1968 | act. | 80's | PC | - | - | |
 | Tata Elxsi (India) Ltd.
| IND | 1989 | act. | 90's | MF | - | | |
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Tata Institute of Fundamental Research (TIFR)
| TIFRAC | IND | 1945 | act. | 50's | SC | | - |
| Tata Unisys Ltd.
| IND | 1986 | 1997† | 80's | PC | - | - | ||
 | Tatung Co., Ltd. | SPARC clone, Mac clone, (+205) | TWN | - | act. | 80's - 00's | PC, TER | | |
| Tau Mark, Inc. | Tera System | USA | - | (†) | 80's | TER | - | - | |
| Taunus-Elektro-Bau GmbH | 1 models | GER | - | (†) | 80's | PC | - | | |
 | Tauon Electronics | PC-1 | USA | - | act. | 10's | PC | - | |
| Taurus Research, Inc. | 2 models | USA | - | (†) | 80's | PC | - | | |
 | Tava Corp. | 12 models | USA | - | † | 80's | PC | - | |
 | Taylorix & Co. GmbH | 8000/8900, System 4, (+32) | GER | 1922 | 1994† | 80's | PC, TER | - | |
| TBB Hofmann | 1 models | GER | - | (†) | 80's | PC | - | | |
 | Tbilissi Experimental Plant of Control Computers (div. Minpribor)
| UVK SM series, (+11) | RUS | - | (†) | 80's | PC | - | - |
| TBS International, Inc. | PC comp. | USA | - | (†) | 80's | PC | - | | |
 | TBS Technologies International Ltd. | Martrix | CHN | 2005 | act. | 90's | PC | - | |
| TC Computers | PC comp., (+14) | USA | - | (†) | 90's | PC | - | | |
 | TCE Industria Electronica de Amazonia S.A. | BRA | - | (†) | 00's | PC | - | - | |
| Tchernovtsy Factory (div. Minpribor)
| UVK SM series | RUS | - | (†) | 80's | PC | - | - |
 | TCI GmbH | GER | 1991 | act. | 90's - 10's | PC | - | | |
 | TCL Computer Technology Co., Ltd. | PC comp., (+9) | CHN | - | † | 00's - 10's | PC | - | |
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TCL Corp.
| CHN | 1981 | act. | 10's | PC | | | |
 | TDE MACNO S.p.A. | ITA | 1976 | act. | 00's - 10's | PC | - | | |
| TDN | PC comp., (+8) | ? | - | (†) | 00's | PC | - | | |
 | TDP Electronics (div. Tandy) | System-100 | USA | - | (†) | 80's | PC | - | |
 | Tealtronic BV (div. TEAL) | TT 2500, (+6) | HOL | 1975 | 1977† | 70's | PC | - | |
| Team Computers & System Ltd. | PC comp. | ISR | - | (†) | 90's | PC | - | | |
 | Team Concepts Electronics Ltd. | ComQuest | HON | - | (†) | 90's | PC | - | |
| Team Systems France | PC comp. | FRA | - | (†) | 90's | PC | - | | |
 | TEC Computer | PC comp. | ? | - | (†) | 90's | PC | - | - |
| Tec Trans International, Inc. | 1 models | USA | - | † | 80's | TER | - | | |
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TecAsia Sdn Bhd
| MAL | 1994 | † | 90's | PC | - | | |
 | Tecdale Group, Inc.
| PC comp. | CAN | - | act. | 20's | PC | - | |
 | Tech Data Corp. | USA | 1974 | act. | 90's - 00's | PC | - | | |
| Tech Direct Europe Plc | PC comp. | UK | - | † | 90's | PC | - | | |
 | Tech Networks of Boston | PC comp., (+6) | USA | - | (†) | 00's | PC | - | - |
 | Tech One Co., Ltd. | JAP | - | act. | 20's | PC | - | | |
 | Tech Personal Computer, Inc. (Tech PC) | PC comp., (+13) | USA | - | (†) | 80's | PC | - | |
 | Tech Source, Inc. | 6 models | USA | - | (†) | 90's | TER | | |
| Tech Ware Computer SA
| PC comp. | FRA | - | (†) | 90's | PC | - | | |
 | Techbyte | POL | - | act. | 00's | PC | - | | |
| Techconic Computer Systems Pty Ltd. | PC comp. | AUS | 1980 | † | 80's | PC | - | | |
| Techdata | 2 models | ? | - | (†) | 80's | TER | - | | |
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Techex Ltd.
| 1 models | UK | - | act. | 90's | PC | - | |
| Techmar Computer Products, Inc. (TCP) | USA | - | (†) | 90's | PC | - | - | ||
 | Techmedia Computer Systems Corp. | PC comp., (+8) | USA | - | 1999† | 80's - 90's | PC | - | |
| Technalogics | TECS | UK | - | (†) | 80's | PC | - | | |
 | Technetronic, Inc. | Copernicus | USA | - | (†) | 80's | TER | - | - |
 | Technew Comercial Ltda. (Z-MAX) | PC comp. | BRA | - | (†) | 00's | PC | - | - |
 | TechNexion Ltd. | TWN | - | act. | 00's - 10's | PC | - | | |
 | Technica House, Inc. | PC comp., (+2) | TWN | 1986 | act. | 80's - 20's | PC | - | |
 | Technical Applications Associates, Inc. | USA | - | act. | 00's - 10's | PC | - | | |
| Technical Communications, Inc. | 1 models | USA | - | † | 70's | PC | - | | |
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Technical Design Labs (TDL)
| Xitan, (+3) | USA | - | † | 70's | PC | | |
 | Technical Instruments | PC comp. | ITA | - | † | 80's | PC | - | |
 | Technical Machine | Tessel | USA | 2013 | act. | 10's | PC | - | |
 | Technical University of Denmark (DTU) | 1 models | DEN | 1829 | act. | 90's | SC | - | - |
 | Technico, Inc. | SS-16, (+7) | USA | 1975 | † | 70's - 80's | PC | - | |
| Technicon Medical Information Systems Corp. | 1 models | USA | - | (†) | 70's | TER | - | - | |
| Techniques industrielles et informatiques (T2i)
| Lys, (+3) | FRA | - | (†) | 80's | PC | - | | |
 | Technische Hochschule Ilmenau | FDJ-Computer (GDC1), (+3) | GER | 1953 | act. | 80's | PC | - | |
 | Technische Hochschule München (TUM) | PERM, G3, (+2) | GER | 1868 | act. | 50's | SC | | |
 | Technische Hochschule Wien (TUW) | MAILUFTERL | AUT | 1815 | act. | 50's | SC | | |
 | Technische Universität Dresden | D1, D2, (+5) | GER | 1828 | act. | 50's | SC | - | |
 | Technische Universität Graz | MUPID, (+3) | AUT | 1811 | act. | 80's | TER | | |
| Technische Universität Magdeburg | HCX | GER | 1871 | act. | 80's | PC | - | | |
 | Technisches Laboratorium Heucke (TLH) | 97.481 | GER | - | 1992† | 70's | PC | - | |
 | Technitrend, Inc. | 1 models | USA | - | (†) | 60's | TER | - | |
 | Technitrol Engineering Co. | 3 models | USA | 1947 | † | 50's - 70's | SC, PC | - | |
| Techno Data, Inc.
| CAN | 1976 | (†) | 80's | PC | - | | ||
| Technoconsult GmbH | PC comp. | GER | - | † | 80's | PC | - | | |
 | Technoland, Inc. | PC comp., (+93) | USA | 1986 | (†) | 90's | PC | - | |
 | TechnoLOG Digital Systems Ltd. | UK | - | (†) | 90's | PC | - | | |
 | Technologic Systems, Inc. | 3 models | USA | 1982 | act. | 90's - 10's | PC | - | |
 | Technologica | 2 models | GER | 1970 | act. | 80's | PC | | |
 | Technological Arts | USA | 1995 | act. | 00's - 10's | PC | - | | |
 | Technologie Recherche et Applications Nouvelles (Tran)
| PC comp., (+3) | FRA | - | (†) | 80's | PC | - | - |
| Technologies Dr Novex | PC comp., (+6) | ? | - | † | 90's | PC | - | | |
 | Technology Advancement Group, Inc. (TAG) | USA | 1984 | act. | 90's - 10's | PC | - | | |
| Technology Congress Ltd. | 1 models | USA | - | (†) | 90's | PC | - | | |
| Technology Distribution Network, Inc. | PC comp., (+10) | USA | - | (†) | 90's | PC | - | | |
| Technology Integrated Products, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
| Technology International Corp. | 4 models | USA | - | (†) | 80's | PC | - | | |
 | Technology Partners,Inc. | PC comp. | USA | 1994 | act. | 90's - 10's | PC | - | |
| Technology Pipeline, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
| Technology Power Enterprise, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Technology Research | PC comp. | FRA | - | (†) | 80's | PC | - | |
 | Technology Resources SA | La Pascaline | FRA | - | (†) | 80's | PC | - | |
| Technology's Edge Corp.
| ERIC | USA | 1976 | † | 70's | PC | - | | |
| Technomax | PC comp. | HON | 1983 | † | 80's | PC | - | | |
 | Technopc | TUR | 2006 | act. | 00's - 10's | PC | - | | |
| Technopi | PC comp., (+5) | USA | - | (†) | 90's | PC | - | | |
 | Technor ISIS Ltd. | UK | - | † | 00's - 10's | PC | - | | |
 | Technosys Research Laboratories Ltd. | Aamber Pegasus | NZL | - | † | 80's | PC | | |
 | Technoten srl | 1 models | ITA | - | † | 80's | PC | - | |
| Technotex | PC comp., (+3) | ? | - | † | 90's | PC | - | | |
 | Techtran Industries, Inc. | 1 models | USA | - | † | 70's | PC | - | |
 | Techview Technology Sdn Bhd | PC comp. | MAL | - | act. | 10's | PC | - | |
| Techware Computer Europe | PC comp., (+6) | ? | - | (†) | 90's | PC | - | | |
| Techway Ltd. | PC comp., (+28) | AUS | - | † | 90's | PC | - | - | |
| Techzas Business Corp. | USA | - | (†) | 90's | PC | - | | ||
 | Teclast Electronics Co., Ltd. | 137 models | CHN | 1999 | † | 00's - 10's | PC | | - |
 | Tecmar, Inc.
| 86M, (+6) | USA | 1972 | 1986† | 80's | PC | - | |
| Tecmont | Y100 | ITA | - | † | 80's | PC | - | | |
 | Tecnicas Electronicas S.A. (TISA) | 2 models | SPA | 1981 | † | 80's | PC | - | - |
 | Tecnint HTE | ITA | 1984 | act. | 10's | PC | - | | |
 | Tecno Wave (div. Centro Mail) | PC comp. | SPA | - | † | 00's | PC | - | - |
 | Tecnodata Industria de Equipamentos Eletronicos Ltda. | MCT-20 | BRA | - | (†) | 80's | PC | - | - |
 | Tecnodiffusione Italia S.p.A. | PC comp., (+11) | ITA | 1988 | † | 90's | PC | - | |
| Tecnoinf
| PC comp. | ITA | - | † | 90's | PC | - | | |
| TECO Information Systems | PC comp., (+5) | USA | - | (†) | 90's | PC | - | - | |
| Tecographics GmbH | SPARC clone, (+5) | GER | - | (†) | 90's | PC | - | | |
| Teconomics | USA | - | (†) | 90's | PC | - | | ||
 | TEGUAR Corp. | USA | - | act. | 00's - 10's | PC | - | | |
 | Tehnicar Computers | YOU | - | (†) | 80's | PC | - | - | |
 | Tehnicom solutions d.o.o. | PC comp. | YOU | 1992 | † | 00's | PC | - | |
| Tehnohard & Chisler | 1 models | BUL | - | (†) | 80's | PC | - | | |
 |
Teito Oy
| FIN | 2009 | act. | 10's - 20's | PC | - | | |
| TEK | 1 models | CAN | - | † | 70's | PC | - | | |
 | Tekdis | AUS | - | act. | 00's | PC | - | | |
 |
Tekelec Airtronic
| 8 models | FRA | 1971 | † | 70's | PC | - | - |
 | Tekelec, Inc. | 3 models | USA | 1979 | † | 80's | PC | | - |
 |
Teket Innovation Technology Co., Ltd.
| CHN | 2003 | act. | 00's - 10's | PC | - | | |
 | Teknekron, Inc. | USA | - | 1991† | 70's - 80's | PC | - | | |
 |
Tekneo (div. Mansoft)
| PC comp., (+11) | FRA | 2000 | † | 00's | PC | - | - |
| Teknim Electronics | TUR | - | (†) | 80's | ? | - | | ||
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Teknor Applicom (div. Kontron)
| CAN | 1999 | † | 00's | PC | - | | |
 | Teknor Microsystems, Inc. | 7 models | CAN | 1985 | † | 90's | PC | - | |
 | TeknoService | PC comp. | SPA | 1991 | act. | 90's - 00's | PC | - | |
 | Tektronix, Inc. | 4051, (+135) | USA | 1946 | † | 70's - 90's | PC, TER | | |
 | TekVisions | USA | - | act. | 00's - 10's | PC | - | | |
| TEL | System 720 | ? | - | (†) | 70's | PC | - | | |
| Tel-Star | TDMS | USA | - | (†) | 70's | SC | - | | |
 | Telcon Industries, Inc. | Zorba, (+25) | USA | - | † | 70's - 80's | MC, PC, TER | | |
 | Tele-Art Ltd. | PocketLyte | HON | - | (†) | 90's | PC | - | |
| Tele-Dynamics Corp. | USA | - | (†) | 80's | TER | - | | ||
| TeleCAD | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Teleco Electronics Ltd. | ATEX 2000 | HON | 1983 | † | 80's | PC | - |  |
| Telecode Computers Ltd. | PC comp. | ISR | - | (†) | 90's | PC | - | | |
 |
Telecom Australia (by ICL, Sinclair)
| Computerphone | AUS | 1975 | 1995† | 80's | PC | | |
| Telecomet, Inc. (-> ITS Japan)
| USA | - | (†) | 80's | TER | - | - | ||
 | Telecommunication and Computer Industries Consortium (TCIC) | IRA | 1995 | act. | 90's | PC | | - | |
 | Télécommunications Radioélectriques & Téléphoniques (TRT) (div. Philips) | Sematrans, Minitel, (+2) | FRA | 1952 | 1989† | 70s - 80's | TER, PC | | |
| Telecommunications Research Establishment (TRE) | TREAC, (+2) | UK | 1940 | † | 50's | SC | | - | |
| Telecommunications Technology, Inc. (TTI) | SAS | USA | - | (†) | 70's | PC | - | | |
| Telecomputing Corp. | TECS 4500, (+2) | USA | - | (†) | 70's | TER | - | - | |
 |
Teleconnect GmbH
| SPARC clone | GER | 1990 | act. | 90's | PC | - | |
| Telecopia s.r.o. | PC comp. | CZE | - | (†) | 90's | PC | - | - | |
 | Teledyne Technologies, Inc. | 6 models | USA | 1960 | act. | 60's | SC | | - |
 |
Telefile Computer Corp.
| 8 models | USA | 1968 | 1987† | 70's | MF, MC | - | |
 | Telefonapparate-, Kabel- und Drahtwerke AG (TeKaDe) | 4 models | GER | 1906 | (†) | 80's | TER | - | |
 | Telefongyár Rt. (Terta)
| 9 models | HUN | 1876 | act. | 70's - 80's | PC, TER | | |
| Telefrang AB | SET 68 | SWE | - | (†) | 70's | PC | - | | |
 |
Telefunken
| TR series, (+17) | GER | 1903 | † | 50's - 10's | SC, MF | | |
 | Telegenix, Inc. | 6 models | USA | 1964 | act. | 80's | TER | - | |
| Telegraphix Ltd. | 1 models | UK | 1986 | (†) | 80's | TER | - | - | |
| Telehuset | PC comp. | NOR | - | (†) | 00's | PC | - | - | |
 | Telemart | PC comp., (+2) | USA | - | (†) | 80's - 90's | PC | - | |
| Telematic S.A. (Tecsa)
| 5 models | BRA | 1981 | † | 80's | PC, MF | - | - | |
| Telematica (-> Talent) | ARG | - | (†) | 80's | PC | - | - | ||
| Telematics International, Inc. | 8 models | USA | - | (†) | 80's | MC, PC | - | | |
 | Telematique SA | Minitel | FRA | - | † | 80's | TER | - | - |
 | Télémécanique Electrique | ALPAM, SOLAR, (+20) | FRA | 1924 | 1988† | 70's | MC, SC | | |
| Telemetrics, Inc. | USA | 1962 | † | 60's | SC | - | | ||
 |
Telenet Communications Corp.
| 5 models | USA | 1971 | 1979† | 70's | MC | - | |
 | Telenorma Datensysteme GmbH | Isy, (+15) | GER | - | † | 80's | TER | - | |
| Telenorth Europe s.r.l. (-> ISAB) | ITA | - | † | 80's | PC | - | - | ||
 | TeleNova | COMPIS, (+2) | SWE | - | † | 80's | PC | | - |
| TelePad Corp. | TelePad, (+2) | USA | - | (†) | 90's | PC | - | | |
 | Telepath | 1 models | USA | - | † | 60's | TER | - | |
 | Telephone Shilpa Sangstha (TSS) Ltd. (Doel) | 3 models | BEN | 1967 | act. | 00's - 20's | PC | | |
| Telepresence | USA | - | (†) | 80's | PC | - | | ||
| Teleprinter Corp. | 1 models | USA | - | † | 80's | TER | - | | |
| Teleprocessing Industries, Inc. | 1 models | USA | - | (†) | 70's | MC | - | - | |
 | Teleram Communications Corp. | 16 models | USA | 1973 | † | 80's | PC, TER | - | |
 | Teleray (div. Research, Inc.) | USA | - | (†) | 70's - 80's | TER | - | - | |
 | Telercas Oy
| Telemac, (+4) | FIN | - | 1991† | 80's | PC | - | |
 | Teleregister Corp.
| 8 models | USA | 1928 | 1964† | 50's - 60's | SC, MF | | |
 | Telesincro S.A.
| Factor, (+15) | SPA | 1963 | 1976† | 60's - 70's | PC, MC, TER | | |
 | Telesis Systems Corp. | 2 models | USA | 1981 | † | 80's | PC |  | |
| Telesoft | USA | - | (†) | 80's | PC | - | | ||
|
Teleswitcher Corp.
| 1 models | USA | - | (†) | 70's | MC, TER | - | - | |
| Telesystems SLW, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Teletek Enterprises, Inc. | 7 models | USA | - | (†) | 80's | PC | - | - |
 | Teletex Communication Corp. | TTX-3000, (+2) | USA | - | (†) | 80's | TER | - | |
 |
TeleType Corp.
| 24 models | USA | 1928 | 1982† | 50's - 90's | TER, PC | | - |
 | Televa Oy
| TDS-8 | FIN | 1945 | (†) | 70's | MC | | - |
 | TeleVideo Systems, Inc. | 154 models | USA | 1976 | 2005† | 80's - 00's | PC, TER | | |
 | Televista Electronics Ltd. | Cosmos | IND | 1968 | act. | 80's | PC | - | - |
 |
Telex Computer Products, Inc.
| 39 models | USA | 1936 | 1988† | 70's - 80's | MC, PC, TER | - | |
 | Teli (-> Telenova) | COMPIS | SWE | - | † | 80's | PC | - | |
 | Telindus | Tellix, (+4) | LUX | 1979 | act. | 90's | PC | - | |
 | Telmac (-> Telercas) | FIN | - | † | 80's | PC | | | |
 | Telmat Informatique SA | T series, TR series, (+9) | FRA | 1983 | † | 80's - 90's | PC, SU | - | |
 | Telmes Műszeripari Szövetkezet | 1 models | HUN | - | (†) | 80's | PC | - | |
 |
Telmi
| Periminitel | FRA | 1983 | 2000† | 80's | TER | - | |
 | Telnex Corp. - AR Division | Interview, (+4) | USA | - | (†) | 90's | PC | - | |
 | Telos Systems Integration | SPARC clone | USA | 1994 | (†) | 90's | PC | - | |
 | Telpar, Inc. | 4 models | USA | 1969 | (†) | 80's | TER | - | |
 | Telrad Communications, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | - |
 |
Telsda Mobile Communication Industry Developing Co., Ltd. (TSD)
| CHN | 1982 | † | 10's | PC | - | | |
 | Telsist Indústria Eletrônica Ltda. | 8 models | BRA | - | (†) | 80's | PC | - | |
 | Teltron Computers, Inc. | USA | - | (†) | 90's | PC | - | - | |
 | Telxon Corp.
| 30 models | USA | 1969 | 2000† | 80's - 90's | PC, TER | - | |
 | Temcy (div. Toa Musen Denki) | 2 models | JAP | - | act. | 80's | PC | | |
| Tempest Products, Inc. | Mac clone, (+185) | USA | - | (†) | 80's | PC | - | | |
| Tempest Technology, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Tempo (-> Everex) | PC comp. | USA | - | (†) | 90's | PC | - | |
 | Tempo Computers, Inc. | 4 models | USA | 1968 | (†) | 60's - 70's | MC | - | |
 |
Temsun Network Technology Co., Ltd.
| PC comp. | CHN | - | act. | 00's - 10's | PC | - | |
 | Tenex Computer Express | PC comp., (+3) | USA | 1982 | † | 80's - 90's | PC | - | - |
| Tennecomp Systems, Inc. | 1 models | USA | - | † | 70's | MC | - | | |
 | TEO Computers & Peripherals, Inc. | TPC 8300, (+4) | CAN | - | (†) | 80's | PC | - | |
| TEP Elektronik Vertriebs GmbH | FTI990, (+3) | GER | 1978 | (†) | 80's | PC | - | | |
 | Tera Computer Company
| MTA | USA | 1987 | 2000† | 90's | SU | | |
 | Tera Electronic Co., Ltd. | PC comp. | TWN | 1976 | (†) | 90's | PC | - | |
 | Teradata Corp. | DBC/1012, (+3) | USA | - | (†) | 80's | SC | | - |
 | Teradyne | 7 models | USA | 1960 | act. | 60's - 80's | SC, MC | | |
 | Terak Corp. | 3 models | USA | 1975 | † | 70's - 80's | PC | | |
 | Terasic, Inc. | USA | 1998 | act. | 00's | PC | - | | |
 | Term-Tronics, Inc. (TTI) | 16 models | USA | 1980 | (†) | 80's | TER | - | - |
 | Termiflex Corp. | 28 models | USA | - | (†) | 70's - 80's | TER | - | |
 | Termina GmbH | 1 models | GER | 1976 | act. | 70's | PC | | |
| Terminal Communications, Inc. (TCI)
| 9 models | USA | 1969 | 1976† | 70's | TER | - | | |
| Terminal Data Corp. | 6 models | USA | 1970 | (†) | 80's | PC, SC, TER | - | | |
| Terminal Display Systems Ltd. (TDS) | System 4007, (+2) | UK | 1973 | (†) | 70's | PC | | | |
 | Terminal Systems, Inc. | 1 models | USA | 1972 | † | 70's | TER | - | - |
 | Terminal Technology Ltd. | MICROSCRIBE, (+4) | UK | - | (†) | 80's | TER | - | |
 | Termtek Computer Co., Ltd. | PC comp. | TWN | 1990 | † | 90's | PC | - | |
 | Tern, Inc. | USA | 1993 | act. | 00's - 10's | PC | - | | |
| Terodec Microcomputer Systems | TMZ-80 | UK | - | † | 80's | PC | - | | |
 | Terra Computer (div. Wortmann) | 5 models | FRA | 1988 | act. | 90's - 20's | PC | - | |
 | TerraDat | PC comp. | UK | 1992 | act. | 90's | PC | - | |
 | TerraLogic Ltd. | PC comp. | UK | - | act. | 00's | PC | - | |
 | Terran Computers Pty Ltd. | PC comp. | AUS | 1982 | † | 80's - 90's | PC | - | |
| Terryelec Technology Co., Ltd. | PC comp. | CHN | - | act. | 00's - 10's | PC | - | | |
 | Terryza | ? | - | act. | 20's | PC | - | - | |
 | Tesa | 1 models | GER | - | (†) | 80's | PC | - | |
 | Tesak S.p.A.
| 5 models | ITA | - | † | 70's | TER | - | |
 | Tesco (div. ProCa)
| PC comp., (+4) | CZE | - | (†) | 90's - 00's | PC | - | - |
 | Tesdata Systems Corp.
| 6 models | USA | 1972 | 1987† | 70's | SC | - | |
| Tesenca (div. Perimetre) | PC comp. | FRA | - | † | 00's | PC | - | - | |
 |
TESLA
| Plan-80, SAPI, (+65) | CZE | 1946 | † | 80's | PC, TER | | |
| Tesla - Vráble | TEMS 80/03A | CZE | - | † | 80's | PC | | |
| Tesla - Liberec | SAPI, (+3) | CZE | - | (†) | 80's | PC | - | |
| Tesla - PieÅ¡Å¥any | PMD-85, (+4) | CZE | - | (†) | 80's | PC | - | |
| Tesla - Strašnice
| JPR-12, (+5) | CZE | - | (†) | 80's | MC, PC | - | |
| Tesla - VysoÄany | MEDA | CZE | - | † | 50's | SC | | |
 | Tesla Elstroj | JPR-8 | CZE | 1949 | (†) | 80's | PC | - | |
 | Tesla ELTOS Dodavatelsko inženýrský Zavod (TESLA-ELTOS-DIZ) | Petr | CZE | - | (†) | 80's | PC | - | |
| Tesla Pardubice - OpoÄÃnek plant | 2 models | CZE | - | † | 60's | SC | | |
| Tesla Pardubice n.p. - Ústav pro výzkum radiotechniky OpoÄÃnek (UVR) | 1 models | CZE | - | † | 60's | SC | | |
 | Teso | CHN | - | (†) | 10's | PC | - | - | |
| Test | PC comp. | ITA | - | act. | 00's | PC | - | | |
 | Tetratek | PC comp. | FRA | - | (†) | 80's | PC | - | |
| Texa | MEX | - | (†) | 00's | PC | - | - | ||
 | Texas Advanced Computing Center (TACC) | STAMPEDE, LONESTAR, RANGER, (+7) | USA | - | act. | 00's | SU | | |
 | Texas Computer Systems (TCS) | PC comp. | USA | - | (†) | 80's | PC | - | |
 | Texas Electronic Instruments, Inc. (TEI) | 13 models | USA | 1967 | † | 80's | PC, TER | | |
 |
Texas Instruments, Inc. (TI)
| TI-99/4A, (+322) | USA | 1951 | act. | 70's - 00's | PC, MC, TER | | |
 | Texas Memory Systems, Inc. (TMS)
| SAM, (+6) | USA | 1978 | 2012† | 90's | MC | | |
 | Texas Microcomputers, Inc. | USA | 1988 | (†) | 90's | PC | - | | |
 | Texas Microsystems, Inc. | 12 models | USA | - | (†) | 90's | PC | - | |
|
Texas Scientific Corp.
| 4 models | USA | 1967 | 1976† | 70's | MC, TER | - | - | |
| Texet Corp. | 1 models | USA | - | † | 80's | PC | - | | |
 | Texet Sales Ltd. (by VTech)
| TX 8000 | HON | 1959 | act. | 80's | PC | | |
 | Texim Europe | HOL | 1962 | act. | 00's - 10's | PC | - | | |
 | Texmarket | PC comp. | RUS | - | † | 90's | PC | - | |
 | Text Tell Ltd. | PX-1000 | HOL | 1979 | † | 80's | TER | - | |
| Texu Electronic Technology Co., Ltd.
| CHN | - | act. | 00's - 10's | PC | - | | ||
| TFE | PC comp. | ? | - | (†) | 90's | PC | - | - | |
 |
TFTBay Technology Co., Ltd.
| CHN | - | † | 10's | PC | - | | |
 | TH Darmstadt - Institut für Praktische Mathematik (IPM) | DERA, ELARD, (+3) | GER | 1877 | act. | 50's | SC | | - |
| Thaddeus Systems, Inc. | USA | - | (†) | 90's | PC | - | | ||
| Thai Computer Manufacturing Co., Ltd. (TCM)
| TAI | 1998 | (†) | 00's | PC | - | - | ||
 |
Thakral Computers Pvt. Ltd.
| 2 models | IND | 1986 | (†) | 80's | PC | - | - |
| Thaler & Co. Mikroprozessortechnik GmbH | PC 810-30, (+2) | GER | - | (†) | 80's | PC | - | | |
| Thame Systems Ltd. | 1 models | UK | - | † | 80's | PC | - | - | |
| Thames Personal Computer Ltd.
| UK | 1979 | † | 70's | PC | - | | ||
 | The Chicago Computer Co. Ltd. | PC comp. | UK | - | † | 90's | PC | - | |
| The Computer Guys | PC comp. | USA | - | (†) | 90's | PC | - | | |
| The Computer Place (TCP) | PC comp. | USA | - | (†) | 90's | PC | - | - | |
| The Computer Shop | PC comp. | UK | - | † | 00's | PC | - | - | |
| The Computer World | PC comp. | UK | - | † | 00's | PC | - | | |
| The Computerist | 1 models | USA | 1976 | (†) | 80's | PC | - | | |
| The Comtrek Computer Warehouse | PC comp. | USA | - | (†) | 80's | PC | - | - | |
 | The Decca Navigator Co. Ltd. | Omintrac, Danac, TANS, (+3) | UK | 1928 | † | 50's - 70's | SC | - | |
 | The Digital Group, Inc. | Bytemaster, (+14) | USA | 1974 | † | 70's | PC | - | |
| The Diversified Group | PC comp. | USA | - | (†) | 80's | PC | - | | |
 | The Engineers Collaborative, Inc. (TECI) | USA | 1985 | (†) | 90's | PC | - | | |
| The G.C. Dewey Corp. | USA | 1955 | † | 60's | SC | - | | ||
 |
The General Corp.
| MSX, LBC-1100, Paxon, (+5) | JAP | - | † | 80's | PC | | |
 | The Interpring Group, Inc. | Summa/11 | USA | - | (†) | 70's | PC | - | |
 | The Jow Dian Enterprise Co., Ltd. (ZD) | 3 models | TWN | - | † | 80's | PC | - |  |
 | The King Computer Systems (TKC Systems) | PC comp. | FRA | - | † | 90's | PC | - | |
| The L.W. Maxson Corp. | USA | 1935 | † | 50's | SC | - | - | ||
 | The Lietz Co. | SDR | USA | 1882 | † | 80's | TER | - | - |
 | The Logical MicroComputer Company (LMC) | MegaMicro, (+7) | USA | - | (†) | 80's | PC | - | |
| The Lynk Corp. | 6 models | USA | - | † | 80's | TER | - | | |
 | The Micro Solution Ltd. | British Genius | UK | - | (†) | 80's | PC | - | |
 | The Micronics Company | Micros | UK | - | (†) | 70's | PC | - | |
 | The Mom Corp. | USA | - | (†) | 90's | PC | - | | |
 | The Network Connection, Inc. | 17 models | USA | - | (†) | 80's - 90's | PC | - | - |
 | The New PC Network | PC comp. | USA | - | (†) | 80's | PC | - | |
 | The Nippon Signal Co., Ltd. (Nippon-Shingo) | HITAC, PASCA, WS-1, (+3) | JAP | 1928 | act. | 70's - 80's | PC | | |
 |
The Norden Laboratories Corp.
| SCRIBE, (+11) | USA | 1943 | † | 40's - 80's | SC, MC, MF | - | |
| The Nucleus | 1 models | USA | - | (†) | 70's | PC | - | - | |
 |
The One Technology Co., Ltd.
| CHN | 2015 | act. | 10's | PC | - | | |
| The Palmspring Corporation | PC comp. | TWN | - | † | 80's | PC | - | | |
| The Panda Project, Inc. | 3 models | USA | - | (†) | 90's | PC | - | | |
| The PC Heaven | PC comp. | ? | - | † | 00's - 10's | PC | - | - | |
| The PC Way BV | PC comp., (+3) | HOL | - | (†) | 90's | PC | - | | |
 | The Portable Computer Co. | PortaPak | AUS | - | (†) | 80's | PC | - | - |
 | The Scam Instrument Corp. | USA | 1953 | † | 60's | SC | - | | |
 | The Sharper Image | Tidalwave clone | USA | 1977 | (†) | 90's | PC | - | |
 | The Software Link, Inc. | PC Shadow | USA | - | † | 80's | PC, TER | - | |
 | The Standard Electric Time Co. | USA | 1884 | † | 50's | SC | - | - | |
| The Standard Register Co. | 1 models | USA | - | † | 70's | TER | - | | |
| The Systems Corp. | 1 models | USA | - | (†) | 70's | MC | - | - | |
 | The Telecrafters Corp. | 2 models | USA | 1970 | † | 70's | TER | - | |
| The Ultimate Corp. | 2 models | USA | - | † | 80's | TER | - | | |
 | Theatrelight NZ Ltd. | PC comp. | NZL | 1972 | act. | 90's | PC | - | |
|
TheLinuxStore (div. EBIZ Enterprises)
| PC comp. | USA | - | † | 00's | PC | - | | |
 | Themis Computer, Inc. | SPARC clone, (+52) | USA | 1989 | act. | 90's - 00's | PC | - | |
 | Theobroma Systems Design und Consulting GmbH | AUT | 2005 | act. | 00's - 10's | PC | - | | |
| Theta Computer Corp of America | USA | - | (†) | 90's | PC | - | | ||
 | Thiim A/S | PC comp. | DEN | 1940 | act. | 90's | PC | - | |
 |
thinENGINE Computer Corp.
| USA | 1984 | act. | 00's - 10's | PC | - | | |
| Think Infotech | IND | - | act. | 20's | PC | - | - | ||
 | Thinker Toys | 1 models | USA | - | (†) | 80's | PC | - | |
 | Thinking Machines Corp. (TMC)
| 6 models | USA | 1983 | 1994† | 80's - 90's | SU | | |
 | Thinkmate | USA | 1986 | act. | 90's - 10's | PC | - | | |
 |
ThinkPenguin
| PC comp. | UK | 2009 | act. | 00's - 10's | PC | - | |
|
Thinkview Technology Co., Ltd.
| PC comp. | CHN | - | act. | 00's - 10's | PC | - | | |
 | Thinlabs, Inc. | USA | 1998 | act. | 00's - 10's | PC | - | | |
 | ThinPC Technology Pvt. Ltd. | IND | 2008 | act. | 00's - 10's | PC | - | | |
 | Thinvent Technologies Pvt. Ltd. | IND | 2007 | act. | 00's - 10's | PC | - | | |
| Third Coast Technologies, Inc. | PC comp., (+5) | USA | - | (†) | 80's | PC | - | | |
| Third Planet Systems Ltd. | PC comp. | UK | - | act. | 00's | PC | - | - | |
| Thomas A. Edison, Inc. | PC comp., (+5) | USA | - | (†) | 90's | PC | - | | |
 | Thomas Engineering Company (TE) | 6 models | USA | 1976 | (†) | 70's - 80's | MC, PC, TER | - | |
 | Thomas-Krenn AG | GER | 2002 | act. | 00's - 10's | PC | - | | |
 | Thompson Ramo Wooldridge (TRW) | 9 models | USA | 1958 | 1964† | 60's | MF | | |
 | Thompson, Harriman & Edwards Computer Products Co., Ltd. | PC comp., (+8) | USA | 1986 | (†) | 80's | PC | - | |
 | Thomson Computing | FRA | 2013 | act. | 10's - 20's | PC | - | | |
 | Thomson CSF
| 11 models | FRA | 1968 | 2000† | 80's | PC, TER | | - |
 | Thomson SA
| 16 models | FRA | 1883 | 2000† | 80's | TER, MF, PC | | |
 | Thomson-Léanord | MO5 NR | FRA | - | † | 80's | PC | - | |
 | Thomson's Computer Warehouse, Inc. (TCW) | PC comp. | USA | - | 2005† | 00's | PC | - | |
 | Thönnes Datensysteme GmbH | PC comp., (+2) | GER | 1987 | act. | 90's | PC | - | - |
 | Thor | PC comp. | ITA | - | † | 90's | PC | - | - |
 | Thorn EMI | 2 models | UK | 1979 | † | 80's | PC | | |
 | Thoroughbred Microsystems, Inc.
| TSU-386, (+2) | USA | - | (†) | 80's | PC | - | - |
| Thought Works, Inc. | USA | 1977 | † | 80's | PC | - | | ||
| Thoughtworks | 1 models | USA | - | † | 80's | PC | - | | |
| Three Phoenix Test, Inc. | 2 models | USA | - | † | 70's | PC | - | | |
 |
Three Rivers Computer Corp. (3RCC)
| PERQ, (+12) | USA | 1974 | 1983† | 70's - 80's | MC, PC, TER | | - |
|
Thücob Elektronik Handel GmbH
| PC comp. | GER | - | † | 00's | PC | - | - | |
 |
Thunder Speed Technology Co., Ltd.
| CHN | 2004 | act. | 00's - 10's | PC | - | | |
| Ti'Ko Computer Corp. | PC comp., (+6) | USA | - | (†) | 90's | PC | - | | |
|
Tianjin Electronics Computer Factory
| X 1200, (+6) | CHN | - | (†) | 60's - 80's | SC, PC | - | - |
| Tianjin Hongxing Factory | 2 models | CHN | - | (†) | 70's | TER | - | |
|
Tianjin Institute of Radio Technology
| DJS, (+6) | CHN | - | (†) | 70's - 80's | PC, MC | - | - |
| Tianjin Radio Factory n°2 | DJS | CHN | - | (†) | 70's | MC | - | |
| Tianjin Wireless Plant n°5 | DJS, (+3) | CHN | - | (†) | 80's | PC | - | |
 | TiCo Computers | PC comp. | YOU | - | act. | 00's | PC | - | - |
 | Tidal Engineering Corp. | USA | - | act. | 00's - 10's | PC | - | | |
 | Tidalpower Technology, Inc. | PC comp. | TWN | 1993 | act. | 00's | PC | - | |
 | Tidalwave Microtech, Inc. | PS-1000 | TWN | - | (†) | 90's | PC | | |
|
Tietoasema
| PC comp. | FIN | 2005 | † | 00's | PC | - | - | |
 |
TietoTasku Oy
| PC comp. | FIN | - | † | 90's | PC | - | |
 | Tiger Direct (div. Systemax) | PC comp., (+105) | USA | 1987 | act. | 90's - 00's | PC | | |
 | Tiger Electronics Ltd. | TLC | USA | 1978 | † | 90's | PC | | |
| Tigera Group, Inc. (-> Fortune Systems)
| USA | 1987 | † | 80's | PC | - | - | ||
| TIL Systems Ltd. | 2 models | CAN | 1973 | † | 80's | PC, TER | - | - | |
| Timark Microsystems | 1 models | USA | - | † | 80's | PC | - | | |
 | Timatic SA | Minitel | FRA | - | † | 80's | TER | - | |
 | TIME Computers (div. Granville Technology) | 68 models | UK | - | † | 80's - 00's | PC | | |
| Time Keeping Systems, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 |
Time Office Computers Pty Ltd.
| Kookaburra, (+3) | AUS | 1982 | NB | 80's | PC, TER | - | |
 | Time-Sharing Terminals, Inc. | 3 models | USA | - | (†) | 60's | TER | - | |
|
TimeFracture
| D16/M | USA | - | (†) | 00's | SC | - | |
| Timeplex, Inc. | 3 models | USA | 1969 | (†) | 80's | MC, PC | - | | |
 | Timeshare Devices, Inc. | 1 models | USA | - | † | 60's | TER | - | |
 | Timex Computer Corp. (-> Timex Sinclair) | USA | 1982 | 1984† | 80's | PC | - | - | |
| Timex of Portugal, Lda (div. Timex) | 12 models | POR | 1985 | † | 80's | PC | | | |
 |
Timex Sinclair
| 5 models | USA | 1982 | 1984† | 80's | PC | | |
|
TiMicro Oy
| PC comp. | FIN | - | † | 90's | PC | - | | |
| Timpex | PC comp., (+5) | ? | - | (†) | 90's | PC | - | | |
 |
Tiny Computers Ltd.
| PC comp., (+122) | UK | 1990 | 2005† | 90's - 00's | PC | | |
 | Titan | PC comp., (+3) | SWI | - | (†) | 80's | PC | - | |
| Titan | PC comp., (+5) | ? | - | (†) | 00's | PC | - | | |
 |
Titan
| 79 models | FRA | 1983 | † | 90's - 00's | PC | - | |
 | Titan Computer | PC comp. | ITA | - | † | 90's | PC | - | |
 | Titan Computers | PC comp. | USA | 2008 | act. | 00's | PC | - | |
| Titan Plc | PC comp., (+8) | UK | - | † | 90's | PC | | | |
 | Titanium Gamer | PC comp. | USA | - | † | 00's | PC | - | |
| TITN, Inc. | 5 models | USA | - | (†) | 80's | PC | - | - | |
 | Tiwox | ? | - | act. | 10's | PC | - | - | |
| TJ Technology, Inc. | PC comp. | USA | - | † | 90's - 00's | PC | - | | |
 | TL Electronic GmbH | GER | 1983 | act. | 90's - 20's | PC | - | | |
 | TL Industries, Inc. | MIKUL, (+10) | USA | 1970 | act. | 70's | PC | - | |
 | TLF Corp. | 2 models | USA | - | † | 70's | MC | - | |
 | TLW Computer Industries, Inc. | USA | - | † | 70's | PC | - | - | |
 | TMAX Digital, Inc. (NuVision) | 8 models | USA | - | act. | 00's - 10's | PC | | |
 | TMG Computers, Inc. | PC comp., (+4) | USA | - | † | 00's | PC | | |
 | TNC Industrial Co., Ltd. | TWN | - | (†) | 90's | PC | - | | |
 | TNT d.o.o. | PC comp. | YOU | 2001 | act. | 00's - 10's | PC | - | |
 | Toa Musen Denki Co., Ltd. | JAP | 1951 | act. | 70's | PC | | | |
 | Tobia (-> ITAL.S.EL.DA) | ITA | - | † | 80's | PC | - | | |
 | Tocad Energy Ltd. | PC comp. | HON | 1979 | act. | 00's - 10's | PC | - | |
| Tochelelektropribor Plant - Kiev
| Ros | RUS | - | (†) | 70's | SC | - | - |
 | Tochigi Keisan Center K.K. (TKC) | V-80 | JAP | 1966 | act. | 80's | TER | - | |
| Todaytech Wholesale Pty Ltd. | PC comp. | AUS | - | (†) | 90's | PC | - | | |
 | Together International Co., Ltd. | HON | 2009 | act. | 00's - 10's | PC | - | | |
 | Tohoku University | SENAC-1 | JAP | 1911 | act. | 50's | SC | - | - |
| TOKK Computer | 1 models | RUS | - | (†) | 90's | PC | - | | |
 | Toko, Inc.
| Tokom 80 | JAP | 1955 | act. | 70's | PC | - | |
 | Tokyo Institute of Technology (Tokyo Kogyo) | PRESTO, (+5) | JAP | 1881 | act. | 60's - 90's | SC | - | |
 | Tokyo Juki Industrial Co., Ltd. | 1 models | JAP | 1943 | act. | 80's | PC | | |
| Tokyo Shibaura Electric K.K. (-> Toshiba)
| JAP | - | act. | 60's | SC | - | - | ||
 |
Tokyo Television Acoustic Co. (TEAC)
| PS-80, (+6) | JAP | 1953 | act. | 70's - 10's | PC, MC | | |
 | Tolerant Systems, Inc. | Eternity, (+3) | USA | 1982 | (†) | 80's | MC | - | - |
 | Tomax Industries Ltd. | PC comp. | HON | 1998 | † | 00's - 10's | PC | - | |
 | Tomcat Computer, Inc. | 3 models | JAP | 1979 | † | 80's | PC | - | |
| Tomsk Mathematical Machines Plant | Sever-2 | RUS | - | (†) | 60's | PC | - | - |
| Tomtronic | PC comp., (+2) | ? | - | (†) | 90's | PC | - | | |
 | Tomy Company, Ltd. | Tutor, (+2) | JAP | 1924 | act. | 80's | PC | | |
| Tonel | 1 models | ITA | - | † | 80's | PC | - | | |
 |
Tongfang Co., Ltd. (THTF)
| PC comp., (+97) | CHN | 1997 | act. | 00's - 10's | PC | | - |
 | Tonino Lamborghini Digital S.p.A.
| PC comp. | ITA | - | act. | 00's | PC | - | |
 | Tono Corp. | Theta, (+5) | JAP | - | (†) | 70's | PC, TER | - | |
 |
Tonstep Electronics Technology Co., Ltd.
| CHN | 2009 | act. | 10's | PC | - | | |
| Tontru Information Industrial Group Co., Ltd. | PC comp. | CHN | - | act. | 90's | PC | - | - | |
|
TOO "Jaguana"
| 1 models | RUS | - | (†) | 90's | PC | - | | |
| TOO "Khimak" - Novosibirsk | HIMAC 48, HIMAC 128, (+2) | RUS | - | (†) | 90's | PC | | | |
| Top Data | USA | - | (†) | 90's | PC | - | | ||
 | Top Eight Industrial Corp. | TWN | 1985 | † | 00's - 10's | PC | - | | |
| Top Group | PC comp. | CHN | - | act. | 00's - 10's | PC | - | | |
 | TOP Microsystems Corp. | USA | 1989 | act. | 90's | PC | - | | |
 | Top PC International, Inc. | PC comp., (+3) | USA | - | (†) | 90's | PC | - | |
 | Top per l'ufficio s.r.l. | PC comp. | ITA | - | (†) | 90's | PC | - | |
 | Top Tech International Co., Ltd. | TWN | 1991 | act. | 00's | PC | - | | |
| Top-link Computer, Inc. | PC comp., (+10) | USA | - | (†) | 90's | PC | - | | |
| Topcat | PC comp. | ? | - | (†) | 90's | PC | - | | |
 | Topdashing (div. Eitein) | CHN | - | act. | 10's | PC | - | | |
 | Topline Digital Technology Ltd. | CHN | - | act. | 00's - 10's | PC | - | | |
 | Topline Technologies, Inc. | PC comp., (+5) | BRA | 1994 | act. | 90's | PC | - | |
 | Topline/Tulip | PC comp., (+11) | HOL | - | † | 00's | PC | - | - |
| Topnotch Technologies | USA | - | (†) | 90's | PC | - | | ||
 |
Topnote
| PC comp., (+7) | ? | - | (†) | 90's | PC | - | |
|
Topologix, Inc.
| 1 models | USA | 1987 | † | 80's | PC | - | | |
 | Toppan Moore Co., Ltd. | REXON | JAP | 1955 | act. | 80's | PC | | |
 | TOPPCS International | PC comp., (+5) | USA | - | (†) | 90's | PC | - | |
 | Tops CCC Technology Co., Ltd. | TWN | 1987 | act. | 90's - 10's | PC | - | | |
|
Topstar Digital Technology Co., Ltd.
| PC comp., (+3) | CHN | 2003 | (†) | 00's | PC | - | - | |
 | Toptek (by Wen Yaung Technology Corp.)
| PC comp. | TWN | - | (†) | 80's | PC | - | |
| Toptek Micro Center, Inc. | PC comp. | USA | - | † | 80's | PC | - | | |
 | Tora Computer Co. Ltd. (VZIO) | VZIO | TAI | 2001 | † | 00's | PC | - | |
 | Toradex AG | SWI | 2003 | act. | 00's - 20's | PC | - | | |
 | Torch Computers Ltd. | Communicator, (+22) | UK | 1982 | † | 80's | PC | | |
| Tornado | PC comp. | AUT | - | † | 80's | PC | - | | |
 | Toronto MicroElectronics, Inc. (TME) | 46 models | CAN | 1986 | act. | 90's - 10's | PC | - | |
| Torque Systems | USA | - | (†) | 80's | PC | - | - | ||
 |
Toshiba Corp.
| TOSBAC, Tecra, Satellite, Portégé, (+10560) | JAP | 1939 | act. | 60's - 10's | MF, MC, PC, TER | | |
|
Toshiba Personal Computer System Corp. (TOPS)
| 17 models | JAP | 1985 | 2018† | 80's - 10's | PC | - | | |
 | Total Control Solutions, Inc. (div. Comark) | USA | 1996 | † | 00's | PC | - | | |
 | Total Peripherals Pty Ltd. (TPG) | PC comp., (+26) | NZL | 1986 | act. | 80's - 90's | PC | | |
 | Total Peripherals, Inc. (TPI) | PC comp., (+7) | USA | - | † | 90's | PC | - | |
| Total Solutions | 1 models | UK | - | (†) | 90's | PC | - | | |
| Total Tec Systems, Inc. | Macro-73, (+2) | USA | - | (†) | 80's | PC | - | | |
 | Totally Awesome computers | USA | - | 2006† | 00's | PC | | - | |
 | Toto
| PC comp. | TWN | - | (†) | 80's | PC | - | |
| Tottori SANYO Electric Co., Ltd. | JAP | - | (†) | 80's | PC | - | | ||
| Touch | PC comp., (+44) | ? | - | † | 90's | PC | - | | |
 | Touch Dynamic, Inc. | USA | 2001 | act. | 00's - 10's | PC | - | | |
| Touch Mobile | PC comp., (+6) | ? | - | (†) | 00's | PC | - | - | |
| Touch Screens, Inc. | USA | 1995 | act. | 00's - 10's | PC | - | | ||
 |
Touch Think Electronic Technology Co., Ltd.
| CHN | 2013 | act. | 10's | PC | - | | |
 |
Touch-Pie Electronic Technology Co., Ltd.
| CHN | 2012 | act. | 10's | PC | - | | |
| Touche Computers | PC comp. | ? | - | † | 90's | PC | | | |
 | Touche Micro Technologies (div. PC PROS) | PC comp. | USA | - | (†) | 90's | PC | - | |
 |
TouchStar (div. Belgravium)
| 17 models | UK | - | act. | 00's - 10's | PC | | |
 | TouchSystems Corp. | USA | 1996 | act. | 00's - 10's | PC | - | | |
| Toughcom, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Tovarna Meril Kopa d.d. | KOPA 1000, (+2) | YOU | 1978 | act. | 80's | PC, TER | | - |
| Tower Systems Industries (TSI) | PC comp., (+3) | USA | - | (†) | 80's | PC | - | | |
| Toyo | Pecker-1 | JAP | - | (†) | 70's | PC | - | | |
 | Toyo Menka Kaisha, Ltd. (TMK)
| 3 models | JAP | 1920 | † | 80's | PC | - | |
 | Toyohashi University of Technology | 1 models | JAP | 1976 | act. | 90's | SC | - | |
 | TPI, Inc. | USA | 1996 | act. | 00's - 10's | PC | - | | |
 | TQ-Systems GmbH | GER | 1995 | act. | 90's - 10's | PC | - | | |
 | TR-Electronic GmbH | GER | - | act. | 00's - 10's | PC | - | | |
 | TRAC | PC comp., (+3) | ? | - | (†) | 90's | PC | - | |
 | Tracewell Systems, Inc. | USA | 1973 | act. | 00's | PC | - | | |
 | Tracor Data Systems, Inc. | 3 models | USA | - | † | 70's | MF | - |  |
|
Trade Electronic Co., Ltd.
| PC comp. | CHN | 2001 | (†) | 00's - 10's | PC | - | | |
| TradeMark | PC comp. | ? | - | (†) | 90's | PC | - | | |
| Tradeware Technology & Service | USA | - | (†) | 90's | PC | - | | ||
| Traffacts Computer Corp. | 1 models | USA | 1981 | (†) | 80's | PC | - | | |
 | Traian Vuia Polytechnical Institute (IPTVT) | 3 models | ROM | 1920 | act. | 80's - 90's | PC | - | |
 | Trak Microcomputer Corp. | USA | - | act. | 80's - 10's | PC | - | | |
| TRAN Telecommunications Corp. | 5 models | USA | - | (†) | 70's | MC | - | | |
 | Tranquil PC Ltd. | PC comp., (+2) | UK | 2003 | act. | 00's | PC | - | |
 | Trans 2000, Inc. | USA | 1988 | act. | 90's - 10's | PC | - | | |
| Trans PC Systems, Inc. | PC comp., (+13) | USA | - | (†) | 80's - 90's | PC | - | | |
 | Trans-Canada Telephone System (TCTS) | Vucom, (+4) | CAN | 1931 | 1999† | 70's | TER | - | - |
| Trans-Delta Interactive Systems | USA | - | (†) | 90's | SC | - | | ||
 | TRANSAC (div. CIT-Alcatel)
| SPD, (+13) | FRA | 1970 | 1983† | 70's | TER, PC | | |
 | Transam Components Ltd. | Tuscan, Triton, (+2) | UK | - | (†) | 70's - 80's | PC | - | |
 |
Transcend Information , Inc.
| PC comp., (+2) | TWN | 1988 | act. | 90's | PC | - | |
 | TransCom, Inc. (div. Hi-G)
| 2 models | USA | 1969 | † | 70's | TER | - | |
 | TransComputer Co., Ltd. | PC comp. | TWN | - | (†) | 80's | PC | - | |
 | Transdata Ltd. | CX 500, (+8) | UK | 1974 | 2000† | 80's | PC, TER | - | |
 | Transduction Ltd. | Superblue | CAN | 1975 | act. | 90's - 10's | PC | - | |
| Transet | USA | - | (†) | 80's | PC | - | | ||
| Transiac Corp. | 1 models | USA | 1981 | (†) | 80's | TER | - | | |
 | Transistor Electronics Corporation, Inc. (TEC) | MCPM-1, (+58) | USA | 1957 | 1991† | 70's - 80's | MC, TER | - | |
 | Transitron Electronics Corp. | TDS/16, (+2) | USA | - | † | 70's | PC | - | |
| Transmeta | PC comp. | ? | - | (†) | 90's | PC | - | - | |
| Transmonde Technologies, Inc. | PC comp., (+6) | USA | - | (†) | 90's | PC | - | | |
 | Transource Computers | 6 models | USA | 1984 | act. | 90's - 10's | PC | - | |
| TransPacific Distribution Ltd. | PC comp., (+10) | USA | - | (†) | 90's | PC | - | | |
 | Transtec Computers | BC2, (+10) | UK | - | (†) | 80's | PC | - | |
 | Transtec Computersystemevertriebs GmbH | SPARC clone, (+4) | GER | - | † | 80's - 00's | PC, TER | | |
 | Transtech Parallel Systems Ltd. | Paramid | UK | 1986 | (†) | 80's - 90's | SU | - | |
 | Transtel Communications Ltd. | 2 models | UK | - | (†) | 80's | TER | - |  |
 | Transwave Corp. (div. UTSC) | 1 models | USA | - | † | 80's | PC | - | |
 | Tranti Systems, Inc. | USA | - | (†) | 70's | SC | - | | |
 | Trapezia (div. Dax) | PC comp. | UK | - | † | 00's | PC | - | |
| TRASK Datasystem AB | SWE | - | (†) | 70's | MC | - | | ||
| Traveller | PC comp. | ? | - | (†) | 90's | PC | - | - | |
|
TRD
| PC comp. | ? | - | † | 00's | PC | - | - | |
| Treasure Chest Computer Systems | PC comp., (+2) | USA | - | (†) | 90's | PC | - | | |
 | Tree of Knowledge
| CLC 9100 | ISR | - | † | 80's | PC | - | |
 | TrekStor GmbH & Co. KG | 30 models | GER | 2001 | act. | 10's | PC | | |
 | Trend Communications Ltd.
| E-Note | UK | 1965 | 2004† | 80's | PC, TER | - | |
 | Trend Harvest E-Tech Development Ltd. | PC comp. | CHN | - | act. | 00's - 10's | PC | - | |
 |
Trendata Corp.
| 1500, (+5) | USA | - | (†) | 70's | PC, TER | - | |
 | Trendcom, Inc. | 2 models | USA | - | † | 80's | TER | - | |
 | Trenew Electronic AG | SWI | 1988 | † | 00's - 10's | PC | - | | |
 | Trenton Systems, Inc. | USA | 1989 | act. | 00's - 10's | PC | - | | |
| Trenton Terminals | PC comp., (+6) | USA | - | (†) | 90's | PC | - | | |
 | Trenz Electronic GmbH | MEGA65 | GER | 1992 | act. | 00's - 10's | PC | - | |
 | Tri Tech Computers | PC comp. | USA | - | † | 80's | PC | - | |
 | Tri-Data Systems, Inc. | Voicepac, Netway, (+4) | USA | - | (†) | 80's | MC, PC | - | - |
 | Tri-L Data Systems, Inc. | 1 models | USA | 1978 | act. | 90's | PC | - | |
 | Tri-M Technologies, Inc. | USA | 1983 | act. | 90's - 10's | PC | - | | |
 | Tri-Star Computer Corp. | PC comp., (+29) | USA | 1988 | † | 90's | PC | - | |
| Tri-Star, Inc. | 1 models | USA | - | † | 70's | MC | - | | |
| Triad Computing, Inc. | USA | - | (†) | 90's | PC | - | | ||
 | Triad Systems Corp.
| PC comp. | USA | - | † | 80's | PC | - | - |
 | Triad Technology | PC comp. | FRA | - | † | 90's | PC | - | |
 | Triangle Digital Services Ltd. | 3 models | UK | - | † | 80's | PC | - | |
 | Tricom Corp. | TPC-8300 | JAP | 1975 | act. | 80's | PC | - | |
| TriComp Systems, Inc. | 3 models | USA | 1981 | † | 80's | PC | - | - | |
 |
Triconex Corp.
| Tricon | USA | 1983 | † | 90's - 00's | PC | | |
 | Tricord Systems, Inc. | 25 models | USA | 1987 | act. | 90's | PC | - | |
| Trident Computer Industries Pty Ltd. | PC comp., (+10) | AUS | - | † | 80's | PC | - | | |
| Trident Technologies Ltd. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | TriEMS Research Lab, Inc. | SBC 200206 | USA | - | † | 90's | PC | - | |
| Triex Technology, Inc. | PC comp. | USA | - | (†) | 80's | PC | - | | |
| Triformation Systems, Inc. | 2 models | USA | - | (†) | 80's | TER | - | | |
 |
TriGem Computer, Inc.
| SPARC clone, (+456) | KOR | 1983 | act. | 80's - 10's | PC, TER | | |
 | Triline (div. AT Computer)
| PC comp. | CZE | - | (†) | 00's - 10's | PC | - | |
 | Trillian Computer Corp. | PC comp. | USA | - | (†) | 80's | PC | - | |
 | TrilliumPC | USA | - | act. | 00's | PC | - | | |
| Trilobyte Computer Corp. | 3 models | USA | - | (†) | 80's | PC | - | - | |
| Trimarcht & Associates, Inc. | TA2, TA200, (+4) | USA | - | (†) | 80's | PC | - | | |
 | Trimble Navigation, Ltd. | 2 models | USA | 1978 | act. | 00's | PC, TER | | |
| Trinamic | PC comp., (+2) | AUS | 1985 | † | 80's | PC | - | | |
 | Tring d.o.o. | YOU | 2002 | act. | 00's - 10's | PC | - | | |
| Trinitech Systems, Inc. | PC comp. | USA | - | † | 90's | PC | - | | |
 | Trinity College Dublin (TCD) - Department of Computer Science | 2 models | IRE | 1969 | act. | 80's | PC | | |
| Trinity Technology | PC comp. | ? | - | (†) | 90's | PC | - | - | |
| Trinology (-> FSE) | PC comp. | GER | - | † | 90's | PC | - | | |
 | Trios Computer Systems | MicroMate | USA | - | † | 80's | PC | - | |
| Triple Force, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Tripod Data Systems, Inc. (TDS) (div. Trimble) | 5 models | USA | 1987 | † | 00's | PC | | |
 | Tripp Lite | PC comp., (+2) | USA | 1922 | act. | 90's | PC | - | |
| Trisage | USA | - | (†) | 80's | PC | - | | ||
| TriState Computer
| PC comp. | USA | - | (†) | 80's | PC | - | | |
| Tritec | 3TK-85 | BRA | - | (†) | 80's | PC | - | - | |
 | Tritec Electronic GmbH | SPARC clone, (+4) | GER | 1991 | (†) | 90's | PC | - | |
| Tritek | PC comp. | USA | - | (†) | 80's | PC | - | - | |
 | Triton Elektronikai Kft. | IPT-02, Gepárd, (+4) | HUN | - | (†) | 80's | PC | | |
| Triton Technology Laboratory Corp. | USA | - | (†) | 90's | PC | - | | ||
 | Trium (div. Mitsubishi) | 1 models | JAP | - | act. | 00's - 10's | PC | | - |
| Triumph Technology Corp. | USA | - | (†) | 90's | PC | - | | ||
 |
Triumph-Adler GmbH (TA)
| Alphatronic, TA-1000, (+102) | GER | 1958 | act. | 70's - 80's | PC, TER | | |
| Trivector Commerce Ltd. | 1 models | UK | - | (†) | 70's | PC | - | | |
 | Trivex, Inc. | 6 models | USA | 1968 | † | 70's | TER | - | - |
| TRO "Javor" - OOZT Informatika i Elektronika | 1 models | YOU | 1948 | (†) | 80's | PC | - | - | |
 | Trogon Computer Corp. | 28 models | USA | 1993 | 2001† | 90's | PC | - | |
 | Trojan | PC comp. | CAN | - | (†) | 80's | PC | - | |
 |
Trommeschläger Computer GmbH (TCS)
| Genie, (+11) | GER | 1980 | † | 80's | PC | - | |
 | tronic5 International GmbH | PC comp., (+21) | GER | - | act. | 90's | PC | - | |
 | Tronsmart | 2 models | CHN | 2013 | act. | 10's | PC | - | |
|
Trost Datentechnik GmbH
| PC comp. | GER | - | † | 80's | PC | - | | |
 |
TRT Telecommunications Corp. - Norfield Division
| 1 models | USA | 1903 | † | 80's | MC | - | |
 | TrueData Products, Inc. | PC comp. | USA | 1983 | act. | 90's - 00's | PC | - | |
 |
Trumps Electronic Technology Co., Ltd.
| PC comp. | CHN | - | act. | 00's - 10's | PC | - | |
| TruSOLUTIONS, Inc. | 2 models | USA | - | † | 00's | PC | - | - | |
| Trust | PC comp., (+2) | ? | - | (†) | 90's | PC | - | - | |
| Trust Comp Prods | PC comp., (+2) | ? | - | (†) | 90's | PC | - | | |
 | Trust International BV
| PC comp. | HOL | 1983 | act. | 90's | PC | | |
 | TRW-Fujitsu Co. (TFC)
| TFC 8500, (+3) | USA | 1980 | 1983† | 80's | PC, TER | | |
 | TRW, Inc. | KL-43, (+12) | USA | 1901 | 2002† | 80's | PC, TER | | - |
| TSC Computer Products, Inc. | USA | - | (†) | 90's | PC | - | | ||
 | TSD Display Products, Inc. (div. Megadata) | 3 models | USA | - | † | 80's | PC, TER | - | |
 | Tsinghua University - Electronics Engineering Department | DJS | CHN | 1911 | (†) | 70's | MC, PC | - | |
| TSL Union Enterprises, Inc. | USA | - | (†) | 90's | PC | - | | ||
 | Tsukumo Co., Ltd.
| PC comp., (+158) | JAP | - | act. | 00's - 20's | PC | - | |
 | Tsunami (div. J.P. Sá Couto) | PC comp., (+236) | POR | 1994 | † | 00's - 10's | PC | - | |
| TTC Computer Products | USA | - | (†) | 90's | PC | - | | ||
 | TTL (by TeknoService) | PC comp. | SPA | - | act. | 90's - 20's | PC | - | |
 | TTX Canada, Inc. | CAN | - | act. | 00's - 10's | PC | - | | |
 | Tulip Computers NV
| 126 models | HOL | 1979 | 2009† | 80's | PC | | - |
| Turbo Guide, Inc. | 7 models | CHN | 1982 | † | 90's | PC | - | | |
| Turbo Star (div. Data Management) | PC comp. | ? | - | † | 80's | PC | - | | |
| Turbolink Computer | PC comp., (+3) | TWN | - | (†) | 90's | PC | - | | |
 | Turn-Point Science Technique Co., Ltd. | PC comp. | TWN | - | (†) | 80's | PC | - | |
|
Turnkey Sales & Leasing, Inc.
| TIP | USA | - | (†) | 80's | MC | - | | |
| Turtle and Hare Computing | USA | - | (†) | 80's | PC | - | | ||
 | Turtle Beach Systems | USA | 1975 | act. | 90's | PC | | | |
| Tusk, Inc. | PC comp. | USA | - | (†) | 90's | PC | - | | |
 | Tussey Computer Products (Swan) | PC comp., (+6) | USA | - | (†) | 80's | PC | - | |
 |
Tuxedo Computers
| PC comp. | GER | - | act. | 00's - 10's | PC | - | |
 | Tuxfarm UG | PC comp. | GER | - | † | 00's | PC | - | |
 | Tuxtops | PC comp. | USA | 1999 | 2001† | 00's | PC | - | |
 |
TVC Italia s.r.l.
| PC comp. | ITA | - | (†) | 90's | PC | - | |
 | Tvornica Racunskih Strojeva (TRS)
| 11 models | YOU | 1948 | (†) | 80's | PC, TER | | - |
| TVS S.p.A. | PC comp., (+2) | ITA | - | † | 90's | PC | - | | |
 | TW Casper Corp. | PC comp. | USA | - | (†) | 90's | PC | - | |
 | TWC Computer Systems (div. aAT) | PC comp. | AUS | - | † | 90's | PC | - | |
 | Twing Computer | PC comp. | FRA | - | † | 90's | PC | - | |
 | Twinhead International Corp. | SPARC clone, (+386) | TWN | 1985 | act. | 80's - 90's | PC | - | |
| Twinlock Australia | MCS | AUS | - | (†) | 80's | PC | - | | |
| Twix Distributing Corp. | PC comp., (+2) | USA | - | (†) | 90's | PC | - | | |
 | Two Pi, Co. | V32, (+2) | USA | - | (†) | 70's | MC | - | |
 | Two Technologies, Inc. (2T) | 5 models | USA | 1987 | act. | 90's - 10's | PC | | |
 | Two Top (div. Unitcom) | PC comp. | JAP | 1990 | act. | 00's | PC | - | |
| Ty-Data Corp. | Easy Riter, (+2) | USA | - | (†) | 70's | PC | - | - | |
 | Tyan Computer Corp. (div. Orient Semiconductor Electronics)
| 6 models | TWN | 1989 | act. | 90's - 10's | PC | | |
 | Tycom Corp. | Microframe, (+15) | UK | - | (†) | 70's - 80's | PC, TER | - | |
| Tyler Business Systems | PC comp. | USA | - | (†) | 80's | PC | - | | |
| Tymnet, Inc. (div. Tymshare) | 5 models | USA | - | † | 80's | MC | - | | |
 | Tymshare, Inc.
| 12 models | USA | 1964 | 1984† | 70's | PC, TER | - | |
 | Tynemouth Software LLP | Mini PET, Minstrel | UK | 2010 | act. | 10's | PC | - | |
 | Typagraph Corp. | 3 models | USA | - | † | 70's | TER | - | |
| Typecraft Systems Ltd.
| UK | - | † | 80's | PC | - | | ||
(c) epocalc 2019