List of operating systems

List of operating systems:

Table of contents

1 Historically Important Early OS
2 Early Proprietary Microcomputer OS
3 Unix-like and other POSIX compliant systems
4 Generic/Commodity, non-UNIX and other
5 Acorn
6 Amiga
7 Atari ST
8 Apple/Macintosh
9 Be Incorporated
10 Digital/Compaq/HP
11 IBM
12 Microsoft
13 Personal digital assistants (PDAs)
14 See also

Historically Important Early OS

CTSS (The Compatible TimeShare System, developed at MIT by Corbato, et al)
THE operating system (by Dijkstra et al)
Multics (joint OS development project by Bell Labs, GE, and MIT)

Early Proprietary Microcomputer OS

Apple Computer (inital version was ROM'd firmware together with Integer BASIC; later versions included a MIcrosoft BASIC)
Business Operating System (BOS) - cross platform, command-line based
Commodore PET, Commodore 64, and Commodore VIC-20,
The very first IBM-PC (3 OS offered to start, USCD P-system, CPM-86, PC-DOS)
Sinclair Micro and QX, etc
TRS-DOS, ROM OS's (largely Microsoft BASIC implementations with file system extensions)
TI99-4
Flex (by Technical Systems Consultants for Motorola 6800 based microcomputers: SWTPC, Tano, Smoke Signal Broadcasting, Gimix, etc)
FLEX9 (by TSC for Motorola 6809 based micros)
mini-FLEX (by TSC for 5.25" disks on 6800 based machines)

Unix-like and other POSIX compliant systems

AIX (Unix from IBM)
AtheOS (continued under the Syllable code-fork)
A/UX (Unix-based Apple OS from the beginning of the 1990s)
BSD (Berkeley Software Distribution, a variant of Unix for DEC VAX hardware)
Cromix (Unix-emulating OS from Cromemco)
Coherent (Unix-emulating OS from Mark Williams Co. for PC class computers)
DNIX
Digital UNIX (which became HP's Tru64)
FreeBSD (one of the open source outgrowths of UC Regents' abandonment of CSRG's 'BSD Unix')
GNU/Hurd
Linux (commonly called GNU/Linux, the name of the entire system taken together
HP-UX from HP
IRIX from SGI
Linux (see GNU/Linux)
Mac OS X from Apple Computer
Minix (study OS developed by Andrew Tannenbaum in the Netherlands)
Menuet
NetBSD (one of the post-CSRG open source varieties of BSD)
NeXTSTEP
OS-9(for Morotola 6809 based machines)
OS-9/68k (for Motorola 680x0 based machines)
OS-9000 (OS-9 written in C for intel and other processors)
OS/360
OSF/1
OpenBSD (one of the post-CSRG opern source varieties of BSD)
Plan 9 (networking OS developed at Bell Labs)
QNX (POSIX, microkernel OS; usually a real time embedded OS)
RiscOS
SCO UNIX (from SCO, bought by Caldera and re-renamed SCO)
Solaris from Sun Microsystems
SunOS from Sun Microsystems (became Solaris)
System V (a release of AT&T Unix, 'SVr4' was the 4th minor release)
UNIX (OS developed at Bell Labs ca 1970 initially by Ken Thompson)
UNIflex (Unix emulating OS by TSC for DMA-capable, extended addresses, Mototola 6809 based computers; eg SWTPC, GIMIX, ...)
Ultrix (DEC's first version of Unix for VAX and PDP-11, based on BSD)
UniCOS
Xenix (Microsoft's licensed version of Unix for various hardware platforms)
z/OS (latest version of IBM mainframe OS)

Generic/Commodity, non-UNIX and other

AOS, now called Bluebottle (a concurrent and active object update to the Oberon operating system)
AROS (Amiga Research Operating System)
Bluebottle (see AOS)
Control Program/Monitor-80 (CPM operating system)
MP/M-80 (Multi programming version of CP/M-86 from Digital Research)
UCSD P-system (portable complete programming environment/operating system developed by a long running student project at the Univ Calif/San Diego; directed by Prof Ken Bowles; written Pascal)
FLEX9 (by TSC for Motorola 6809 based machines; successor to FLEX, which was for Motorola 6800 CPUs)
SSB-DOS (by TSC for Smoke Signal Broadcasting; a variant of FLEX in most respects)
CP/M-86 (CP/M for Intel 8088/86 from Digital Research)
DESQView (windowing GUI for MS-DOS, ca 1985)
DR-DOS (MS-DOS compatible OS from Digital Research, later from Novell, Caldera, ..; still being used for special purpose projects)
FreeDOS (an open source MS-DOS workalike)
GEM (GUI for MS-DOS / DR-DOS from Digital Research)
MS-DOS (Microsoft developed OS for IBM PC compatible machines)
PC-DOS (IBM's version of DOS for PC machines)
Mach (from OS kernel research at CMU; see NextStep)
NewOS
Oberon operating system/(developed at ETH-Zurich by Niklaus Wirth et al) for the Ceres and Chameleon workstation projects. see also Oberon programming language
OS/2 (Windows/MS-DOS compatible operating system developed originally at Microsoft and taken over by IBM; a considerable technical improvement on both early Windows and MS-DOS. Not a commercial success. The Odin open source project adds Windows 9x compatibility to OS/2. See Sourceforge.com for details)
OS-9 (Unix emulating OS from Microware for Motorola 6809 based microcomputers)
OS-9/68k (Unix emulating OS from Microware for Morotola 680x0 based computers; developed from OS-9)
OS-9000 (portable Unix emulating OS from Microware; one implementation was for Intel x86)
SkyOS
TripOS
TUNES
QDOS (developed at Seattle Computer Products by Tim Paterson for the new Intel 808x CPUs; also called SCP-DOS; licensed to Microsoft -- became MS-DOS/PC-DOS)
VisiOn (first GUI for early PC machines, not commercially successful)
VME by International Computers Limited (ICL)
MorphOS (by Genesi)
NetWare (by Novell)
NeXTStep (which, more or less, became Mac OS X by NeXT)
Plan 9, Inferno (networked OS originally from Bell Labs Computer Research)
Primos by Prime Computer
BS2000 by Siemens AG

Acorn

Amiga

AmigaOS

Atari ST

TOS
MultiTOS
MiNT

Apple/Macintosh

Be Incorporated

BeOS
BeIA
Zeta

Digital/Compaq/HP

AIS

OS-8

ITS (for the PDP-6 and PDP-10)
TOPS-10 (for the PDP-10)
WAITS
TENEX (from BBN)
TOPS-20 (for the PDP-10)
RSTS/E (ran on several machines, chiefly PDP-11s)
RSX-11 (multiuser, multitasking OS for PDP-11s)
RT-11 (single user OS for PDP-11)
VMS (by DEC for the VAX mini-computer range; later renamed OpenVMS)

IBM

OS/2
AIX (a version of Unix)
OS/400
OS/390
VM/CMS
DOS/VSE
OS/360 (first OS planned for the System 360 architecture)
MFT (later called OV/VS1)
MVT (later called OV/VS2)
SVS
MVS (latest variant of MVT)
TPF
ALCS
OS/390
z/OS
Basic Operating System (first system released for the System 360, as an interim)
PC-DOS (aka MS-DOS when purchased via Microsoft)

Microsoft

MS-DOS
Microsoft Windows
- Windows 1.0 (for 80286)
- Windows 2.0
- Windows 3.0 the first version to make substantial commercial impact
- Windows 3.1
- Windows 95
- Windows 98 there was a 98 2nd edition as well
- Windows ME
Windows NT (developed at Microsoft by a team led by David Cutler)
- Windows NT 3.5
- Windows NT 4
- Windows 2000 (aka Windows NT v5.0)
- Windows XP (based on Win2K internally, but single user and with disabled capabilities; 2 versions: Home and Professional)
- Windows Server 2003
Xenix (licensed version of Unix; sold to SCO in '90s)
Windows CE (compact edition, for handhelds)

Personal digital assistants (PDAs)

Palm OS from Palm Inc; now spun off as PalmSource
Pocket PC from Microsoft
EPOC originally from Psion (UK), now from Symbian, preferred name now is Symbian OS
Windows CE Windows Compact Edition, from Microsoft