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LEO I (Lyons Electronic Office)
The LEO I (Lyons electronic office I) was the first computer used for commercial business applications. -
DYSEAC
DYSEAC was a first-generation computer built by the National Bureau of Standards for the US Army Signal Corps. -
SHARE Operating System (SOS)
The SHARE Operating System (SOS) was created in 1959 as an improvement on the General Motors GM-NAA I/O operating system, the first operating system, by the SHARE user group. -
Compatible Time-Sharing System (CTSS)
The Compatible Time-Sharing System (CTSS), was one of the first time-sharing operating systems; it was developed at the MIT Computation Center. -
Titan
Titan was the prototype of the Atlas 2 computer developed by Ferranti and the University of Cambridge Mathematical Laboratory in Cambridge, England. -
Dartmouth Time Sharing System
The Dartmouth Time-Sharing System (DTSS) was an operating system first developed at Dartmouth College between 1963 and 1964. It was the first successful large-scale time-sharing system -
THE multiprogramming system
The THE multiprogramming system or THE OS was a computer operating system designed by a team led by Edsger W. Dijkstra -
Michigan Terminal System
The Michigan Terminal System (MTS) is one of the first time-sharing computer operating systems.[1] Developed in 1967 at the University of Michigan for use on IBM S/360-67, S/370 and compatible mainframe computers -
IBM Airline Control Program
IBM Airline Control Program, or ACP, is a discontinued operating system developed by IBM beginning about 1965 -
Unix
Unix is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix -
RSTS/E
RSTS is a multi-user time-sharing operating system, initially developed by Evans Griffiths & Hart of Boston, and acquired by Digital Equipment Corporation (DEC, now part of Hewlett Packard) for the PDP-11 series of 16-bit minicomputers. -
MUSIC/SP
MUSIC/SP (Multi-User System for Interactive Computing/System Product; originally "McGill University System for Interactive Computing") was developed at McGill University in the 1970s from an early IBM time-sharing system called RAX -
Xerox Alto
The Xerox Alto is the first computer designed from its inception to support an operating system based on a graphical user interface (GUI), later using the desktop metaphor. -
Sintran III
Sintran III was a real-time, multitasking, multi-user operating system used with Norsk Data computers from 1974. Unlike its predecessors Sintran I and II, it was entirely written by Norsk Data. Sintran III was written in NORD PL, intermediate language for Norsk Data computers. -
Version 6 Unix
Sixth Edition Unix, also called Version 6 Unix or just V6, was the first version of the Unix operating system to see wide release outside Bell Labs. -
FLEX (operating system)
The FLEX single-tasking operating system was developed by Technical Systems Consultants (TSC) of West Lafayette, Indiana, for the Motorola 6800 in 1976. -
OpenVMS
OpenVMS is a multi-user, multiprocessing virtual memory-based operating system (OS) designed for use in time-sharing, batch processing, and transaction processing. -
Apple DOS
Apple DOS is the family of disk operating systems for the Apple II series of microcomputers from late 1978 through early 1983 -
Atari DOS
Atari DOS is the disk operating system used with the Atari 8-bit family of computers. -
Xenix
XENIX is a discontinued version of the UNIX operating system for various microcomputer platforms, licensed by Microsoft from AT&T Corporation in the late 1970s -
MS-DOS
MS-DOS acronym for Microsoft Disk Operating System) is an operating system for x86-based personal computers mostly developed by Microsoft. -
QNX
QNX is a commercial Unix-like real-time operating system, aimed primarily at the embedded systems market -
Apple ProDOS
ProDOS is the name of two similar operating systems for the Apple II series of personal computers. The original ProDOS, renamed ProDOS 8 in version 1.2, is the last official operating system usable by all 8-bit Apple II series computers, and was distributed from 1983 to 1993 -
Macintosh operating systems
The family of Macintosh operating systems developed by Apple Inc. includes the graphical user interface-based operating systems it has designed for use with its Macintosh series of personal computers since 1984, as well as the related system software it once created for compatible third-party systems. -
Windows 1.0
Windows 1.0 is a graphical personal computer operating environment developed by Microsoft. Microsoft had worked with Apple Computer to develop applications for Apple's January 1984 original Macintosh, the first mass-produced personal computer with a graphical user interface (GUI) that enabled users to see user friendly icons on screen. -
GEOS (8-bit operating system)
GEOS (Graphic Environment Operating System) was an operating system from Berkeley Softworks (later GeoWorks). -
Windows 2.0
Windows 2.0 is a 16-bit Microsoft Windows GUI-based operating environment that was released on December 9, 1987,[1] and is the successor to Windows 1.0.
