Operating System for NCR Century series computers.

NCR, USA

Operating System for NCR Century series computers.

NCR, USA

Operating System for NCR Century series computers.

NCR, USA

Operating System for NCR Century series computers.

NCR, USA

Multiprogramming operating system.

Burroughs, USA

Basic Abstraction Block. 50Kb IA-32 microkernel for DOS. It manages the x86 hardware interaction in a manner similar to Windows' HAL. BABy can be used to provide PMode services to our shareware multiuser O/S, VMiX x86 (listed velow). Distribution includes binaries, sources, makefiles, samples and API docs.

Operating system for mobile devices such as smartphones and tablet computers.

Samsung Electronics, Korea

Real-time operating system developed for a MIPS (Baget-MIPS variant) and Intel BSPs (x86 architecture).

Russian Academy of Sciences, Russia

Network operating system for computers running AT&T's UNIX System V.

Banyan Systems, USA

Exokernel-based single address space operating system.

Return Infinity, USA

Memory-based real-time executive for the IBM 1710.

IBM, USA

Realtime OS for the Phillips P-855 and P-860.

USA

Operating system for the Soviet personal computers BK-0010.

Russia

Also known simply as DOS-11 was the first operating system to run on the Digital PDP-11 minicomputer.

DEC, USA

Business Basic. BASIC language and operating system for Basic Four computers.

MAI Basic Four, USA

Aka BB3.

Aka BB4.

Business Basic Micro. Adanced version of BB. BASIC language and Operating system for Basic Four computers. Similar to BB3/BB4.

MAI Basic Four, USA

Basic Control Monitor for Xerox/SDS computers.

Scientific Data Systems, USA

Practical distributed operating system, initially aimed at 80x86/PC compatible computers. In general BCOS makes a group of computers connected by a network (a cluster of computers) behave like a single computer with multiple users.

Basic Control System for HP-2100.

Hewlett-Packard, USA

BeOS for Internet Appliances. Was a minimized version of BeOS operating system for embedded systems.

Be, USA

Discontinued operating system distribution built using the OpenSolaris source base.

India

Operating system for personal computers first developed by Be Inc. It was first written to run on BeBox hardware.

Be, USA

Operating system for Scientific Data Systems' SDS 940.

Scientific Data Systems, USA

Version of UNIX for VAX, developed at the University of California at Berkeley. Late 1970s through early 1990s. Latest version is 4.4.

U.C. Berkeley, USA

Real-time operating system designed for embedded systems.

Develer, BeRTOS community, Italy

Porgramming language and Operating system for the NEAC System 100 Office computer.

NEC, Japan

Business Executive System for Timesharing. OS for Qantel Minicomputers.

Qantel, USA

Basic Executive & Timekeeper. OS for Varian minicomputers.

USA

Early computing environment originally implemented as a batch processing operating system at Bell Labs for the IBM 704 computer.

IBM, USA

Indian Linux distribution developed by C-DAC, Chennai in order to benefit the usage of Free/Open Source Software in India.

C-DAC/NRCFOSS, India

OpenBSD-based operating system targeted exclusively at the amd64 and armv7 platforms.

Operating system developed with NASM, Free Pascal and GNU-Pascal (BK-OS 32) and Borland Pascal (BK-OS 16).

Claudio Biale, Argentina

Batch-oriented operating system for the Philco-2000 computer.

Philco, USA

Based on the LSX kernel ( UNIX version V6).

Sergey Vakulenko and Leonid Bruchis, Russia

Batch-oriented OS for the CDC 6600.

Lawrence Berkeley Laboratories, USA

Proprietary mobile operating system for the BlackBerry line of smartphones.

BlackBerry, Canada

Proprietary mobile operating system developed by BlackBerry for its BlackBerry line of smartphone handheld devices.

BlackBerry, Canada

Operating system written in COBOL.

Data General, USA

Board-level multitasking executive for National Semiconductor 8080 and Z-80 based CPU boards.

National Semiconductors, USA

Code-name for Taligent OS, successor of Pink.

Apple, USA

Also known as AOS. Concurrent and active object update to the Oberon operating system.

ETH Zurich, Switzerland

Developed jointly by Fujitsu, USAC Electronic Industrial and Uchida Yoko.

Fujitsu, Japan

Basic Monitor System.

DEC, USA

Real-time object-oriented operating kernel for embedded systems.

Baigudin Software, Russia

For medium-scale batch processing. Capable of simultaneously executing one batch process and up to two sub processes.

Fujitsu, Japan

Basic OS for Interdata (later Perkin-Elmer) minicomputers.

Interdata, USA

Batch operating system for Honeywell System 700.

Honeywell, USA

Operating system for Billings computers.

USA

Bubach Operating System. No-kernel small x86 operating system written in Assembly.

BOS with Multiprocessing of up to 4 jobs.

Fujitsu, Japan

Basic Operating System. Early interim version of DOS/360, briefly available at a few Alpha & Beta System/360 sites

IBM, USA

Business Operating Software. Business oriented OS for Z80, PDP-11, 8086, and 68000.

BOS National, USA

Business Oriented System. Floppy-disk oriented operating system for OKITAC office computers.

Oki, Japan

Business Oriented System. Hard-disk oriented operating system for OKITAC office computers.

Oki, Japan

Multitasking, multiprocessing version of BOS/5.

USA

BOS with Virtual memory control.

Fujitsu, Japan

Basic Operating Software System. Based on UNOS by Charles River Data Systems (CDRS).

MAI Basic Four, USA

USA

USA

USA

Batch OS for the DEC PDP-15.

USA

Operating system for the RC-4000 Computer.

Regnecentralen, Denmark

Batch Processing Monitor. Capable of simultaneously performing remote batch processing submitted from a remote location and multiple real-time processing tasks.

Mitsubishi, Japan

Basic Programming Support. Business-oriented OS for the IBM/360.

IBM, USA

Business oriented operating system for the GRI-99.

USA

Previously legOS. Alternative operating system for the Lego Mindstorms RCX Controller.

Operating system for GE computers.

General Electric, USA

Based on modular functions that can be dynamically called by other functions.

Real-Time Operating System.

Brazil

Operating system adopted for the Unidata series of computers.

Siemens, Germany

Now BS2000/OSD from Fujitsu-Siemens Computers (formerly Siemens Nixdorf Informationssysteme).

Siemens, Germany

First released version.

Functionally similar to OS-IV and MSP from Fujitsu.

Siemens, Germany

Berkeley Software Distribution, a variant of Unix for DEC VAX hardware.

U.C. Berkeley, USA

Later known as BSD/OS.

Small real-time OS for Z80, 6809, 8086, 68000.

Boston Systems Office, USA

Batch Time-Sharing Monitor for XDS Sigma 5/7.

USA

Business-oriented version of the TRON OS for office workstations with bitmapped displays. Now Chokanji.

Personal Media, Japan

The command line functionality is reminiscent of DOS.

Hungary

Proprietary operating system of the Burroughs small, medium and large systems, including the Unisys Clearpath/MCP systems.

Burroughs, Unisys, USA

Operating system initially developed as an early cross-platform operating system, originally produced for Intel 8080 and Motorola 6800 computers, then redeveloped for actual businesses and business models.

CAP, UK