Operating system history list

Early Operating System (patent protection)
TRS-DOS, Rom OS's
TI99-4
Commodore pet, 64, VIC-20,
First IBM-PC
Apple
Sinclair micro and QX

　　Non-Unix commercial operating system CPM Operating System

MP/M-80
UCSD p-System
Mini-flex
SSB-DOS
CP/M-86
Dr-DoS
Freedos
MS-DOS
PC-DOS
Mach
Multics
OS-9

　　UNIX and similar systems

UNIX
Microsoft XENIX
Cromix
Uniflex
OS-9
IBM AIX
BSD
FreeBSD
NetBSD
OpenBSD
Digital UNIX, that is, Compaq Tru64
Dnix
HP HP-UX
GNU/Hurd
IRIX of SGI
Linux (or GNU/Linux)
MacOS X
OSF/1
SCO's SCO Unix
Sun's SunOS, that is, the subsequent Solaris
System V
Ultrix
Unicos
Lindowsos
OS/390
Z/OS
Syllable

　　Others

Acorn
Riscos
Arthur

Amiga
Amigaos

Atari St
ToS
Multitos
Mint

　　Apple Computer(Apple/Macintosh)

Apple DOS
Prodos
Mac OS
Mac OS X

Be
BEOs
Beia

　Digital/Compaq(Compaq)

AIS
OS-8
RSTs/E
RSX-11
RT-11
Tops-10
Tops-20
VMS (later renamed OpenVMS)

　　IBM

OS/2
AIX
OS/400
OS/390
VM/CMS
DOS/VSE
OS/360
MFT
MVT
SVS
MVS
TPF
ALCs
Z/OS

　Microsoft(Microsoft)

MS-DOS
XENIX
Windows 1.0
Windows 3.1
Windows 95
Windows 98
Windows ME
Windows Longhorn
Windows NT
Windows 3.5
Windows 4
Windows 2000
Windows XP
Windows Server 2003

　　Novell

　　Netware

　　Next

Nextstep (Mac OS X later)
Plan 9
Inferno

Prime computer
Primos

　　Siemens

Bs2000

　　Personal Electronic Assistant (PDA) Operating System

Palm OS
Pocket PC
EPOC
Microsoft Windows CE

This article presents a timeline of events in the history of computer operating systems from 1960 to 2003. For a narrative explaining the overall developments, see the related history of computing.

1961
Ctss
1964
OS/360 (announced)
1965
Multics (announced)
OS/360 (shipped)
Tape Operating System (ToS)
1966
MS/8
1967
CP/CMS
Its
Waits
1969
ACP (IBM)
Tenex
UNIX
1970
DOS/batch 11 (PDP-11)
1971
/A>
1972
MFT
MVT
Rdos
SVS
VM/CMS
1973
Alto OS
RSX-11D
RT-11
VME
1974
MVS (MVS/xa)
1976
/A> tops-20
1978
Apple DOS 3.1 (first Apple OS)
Tripos
VMS
1979
Apple Denial of Service (DoS) 3.2
1980
Apple Denial of Service (DoS) 3.3
OS-9
Qdos
SOS
Xde (Tajo) (Xerox Development Environment)
XENIX
1981
MS-DOS
1982
SunOS (1.0)
Ultrix
1983
Lisa OS
Coherent
Prodos
1984
Macintosh OS (system 1.0)
QNX
Unicos
1985
Amigaos
Atari TOS
MIPs OS
In Microsoft Windows 1.0
1986
GS-OS
HP-UX
1987
Arthur
IRIX (3.0 is first SGI Version)
Minix
/A> (1.0) Microsoft Windows 2.0
1988
A/UX (Apple Computer)
Lynxos
MVS/ESA
OS/400
1989
AIX
Nextstep (1.0)
Proteus OS
SCO Unix (Release 3)
1990
BEOs (V1)
O/A>
1991
Linux
1992
Solaris (2.0 is first not called SunOS)
Windows 3.1
1993
Plan 9
FreeBSD
NetBSD
Windows NT 3.1 (first version of NT)
1995
Digital UNIX (aka Tru64)
OpenBSD
OS/390
Windows 95
1997
Mac OS 7.6 (first officially-named Mac OS)
1998
Windows 98
1999
Mac OS 8
2000
Atheos
Mac OS 9
Windows 2000
Windows ME
2001
Mac OS X
Windows XP
Z/OS
2002
Syllable
2003
Windows Server 2003