SAIL, Stanford Artificial Intelligence Laboratory. Time-sharing system for DEC PDP-6 and PDP-10, later TOPS-10.

DEC, USA

Used on the VS line of minicomputer systems.

Wang Laboratories, USA

Mobile operating system of the Apple Watch.

Apple, USA

PC-DOS version.

Waterloo Microsystems, USA

See LG webOS.

Palm, USA

Simple share file system for distributed environment.

USA

MC-68K multiuser OS for their proprietary microcomputers, used mainly for CBT systems.

WICAT, USA

16-bit and 32-bit preemptive and cooperative multitasking, running atop MS-DOS.

Microsoft, USA

First version of Microsoft Windows.

Microsoft, USA

Aka Windows NT 10. Series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems.

Microsoft, USA

Second version of Microsoft Windows.

Microsoft, USA

Separate version for i386 processor.

Aka Windows NT 5.0. Four editions of Windows 2000 were released: Professional, Server, Advanced Server, and Datacenter Server.

Microsoft, USA

Second version of Microsoft Windows including a significantly revamped user interface as well as technical improvements to make better use of the memory management capabilities of Intel's 80286 and 80386 processors.

Microsoft, USA

Same as Windows 3.0 except required a minimum of a 286 PC with 1 MB of RAM to run, removed CGA support, TrueType font support, Ehanced Mode support.

Microsoft, USA

Improved version of Windows 3.1.

Microsoft, USA

Chinese-only release of Windows 3.

Microsoft, USA

Aka Windows NT 6.1. Code name Blackcomb and Vienna.

Microsoft, USA

Aka Windows NT 6.2. Windows 8 introduced major changes to the operating system's platform and user interface to improve its user experience on tablets.

Microsoft, USA

Aka Windows NT 6.3. Free update of Windows 8.

Microsoft, USA

Aka Windows 4.0. Codename Chicago. Windows 95 merged Microsoft's formerly separate MS-DOS and Windows products, and featured significant improvements over its predecessor, most notably in the graphical user interface (GUI) and in its simplified "plug-and-play" features.

Microsoft, USA

Aka Windows 4.1. Codename Memphis. Like its predecessor, Windows 98 is a hybrid 16-bit and 32-bit monolithic product with the boot stage based on MS-DOS.

Microsoft, USA

Microsoft Azure (formerly Windows Azure). Cloud computing service created by Microsoft for building, testing, deploying, and managing applications and services through a global network of Microsoft-managed data centers.

Microsoft, USA

Operating system for handhelds, embedded devices, and real-time applications that is similar to other versions of Windows.

Microsoft, USA

Released in 1999 as Windows NT Embedded 4.0. See IoT.

Microsoft, USA

See Windows CE. Version of Windows Embedded for very small computers and embedded systems, including consumer electronics devices like set-top boxes and video game consoles.

Formerly Microsoft Auto, Windows CE for Automotive, Windows Automotive, and Windows Mobile for Automotive, is an embedded operating system based on Windows CE for use on computer systems in automobiles.

See Windows 10 IoT Core. Considered by some to be the successor to Windows Embedded Compact, although it maintains very little compatibility with it. Optimized for smaller and lower-cost industry devices, it is also provided free of charge for use in devices like the Raspberry Pi for hobbyist use.

See. Windows 10 IoT Core Pro. Provides the ability to defer and control updates and is licensed only via distributors; it is otherwise identical to the normal IoT Core version.

See Windows 10 IoT Mobile Enterprise. Adds ARM support, multiple user profiles, advanced lockdown, and other capabilities, but is otherwise identical to the normal Mobile version.

Formerly Windows Embedded POSReady and Windows Embedded for Point of Service, is an operating system subfamily developed by Microsoft as part of its Windows Embedded family of products.

See Windows 10 IoT Mobile. Based on Windows 10 Mobile, is the successor to Embedded Handheld.

Updated version of Windows Embedded for Point of service, named Windows embedded POSReady 2009.

Based on Windows XP with SP2 and designed for use in Point of Service situations, WEPOS expanded Microsoft's Windows Embedded family of products.

See Windows 10 IoT Enterprise. Successor to both Embedded Industry and Embedded Standard with plain unlabeled, Retail/Thin Client, Tablet, and Small Tablet versions available.

Based on Windows XP with SP3, this version offers more features over Windows Embedded for Point of Service such as Full Localization and XPS support if .NET Framework 3.5 or higher is installed.

Brand of Windows Embedded operating systems designed to provide enterprises and device manufacturers the freedom to choose which capabilities will be part of their industry devices and intelligent system solutions.

First version of Windows Embedded Industry to be based on the Windows 7 Platform.

Based on Windows 8. Available in both Pro and Enterprise versions. The Pro version is only available pre-installed on OEM devices, while the Enterprise version is available through the volume licensing channel only.

Based on Windows 8.1.

Extension that allowed users to share their resources and to request those of others without a centralized authentication server. Originally codenamed Winball and later Sparta.

Microsoft, USA

See Windows 3.1.

See Windows 3.11.

Thin client operating system based on Windows XP Embedded and is optimized for older, less powerful hardware.

Microsoft, USA

Based on Windows Server 2003.

Microsoft, USA

Based on Windows Server 2008 R2.

Microsoft, USA

Aka Windows ME (Windows 4.9). Familial version of Windows 2000.

Microsoft, USA

Based on Windows CE, but for a smaller form factor.

Microsoft, USA

Full 32-bit or 64-bit kernel, not dependent on MS-DOS. Part of Windows Server Family.

Microsoft, USA

First Windows NT kernel public release.

Windows Phone mobile client operating system.

Microsoft, USA

Brand name for a group of server operating systems released by Microsoft.

Microsoft, USA

Aka Windows NT 5.2

Based on Windows Vista.

Based on Windows 7.

Based on Windows 8.

Aka Windows NT 6.0

Microsoft, USA

Aka Windows NT 5.1

Microsoft, USA

32-bit operating system with a primitive shell implemented.

University of Madras, India

Small OS for the M6800.

Wintek, USA

High-performance virtualized Linux. microkernel OS; usually a real time embedded OS.

National ICT Australia, Australia

Microkernel based operating system including OS/2, developed and canceled in the 1990s.

IBM, USA

Wang Word Processing System. Micro-code based system.

Wang Laboratories, USA

Operating system for the IBM System/360.

Stanford University, USA