MICROCOMPUTER OPERATING SYSTEMS

Operating systems for microcomputers and personal computers. Early systems in this category have command-line (character-oriented) user interfaces, while later systems are generally GUI-based. See also Workstation Operating Systems.
AmigaDOS
Basic operating system for Amiga computers. Derived from TRIPOS. Mid 1980s [Pountain 1986].
AMOS
Multiuser, multiprocessing OS for the 68000 family of microprocessors. Alpha Microsystems. Early 1980s.
AppleDOS
Basic Operating System for Apple II Computers. Late 1970s.
AtariDOS
Operating System for the Atari 400/800. Late 1970s.
CDOS
Os based on CP/M for Cromemco Computers (8080 series). Late 1970s.
Concurrent 68K, Concurrent 286
Real-time multi-user OS for the 68000 and 80x86 family. Combines features of PC-DOS and UNIX. Digital Research, Mid 1980s.
Concurrent CP/M-86
A version of CP/M-86 supporting limited multitasking. Digital Research, early 1980s [Kornstein 1983].
Concurrent DOS, Concurrent PC-DOS
Multitasking OS combining capabilities of PC-DOS and CPM. For 8086 & 68000 families. Digital Research, early 1980's.
Concurrent DOS 8-16
Combined version of Concurrent DOS and CP/M 2.2. CompuPro, Early 1980s.
CP/M
Control Program for Microcomputers. For Intel 8080 and Z-80. Digital Research Inc. Widely used version is CP/M 2.2. First OS for Microcomputers. About 1975 [Kildall 1981, Zaks 1980].
CP/M-86
Extended CP/M based OS for 8086 family. Digital Research, Early 1980s [Kildall 1981].
CP/M 8-16
Combined version of CP/M 2.2 and CP/M-86. CompuPro, Mid 1980s.
CP/M Plus
Extended version of CP/M supporting segmented addressing, etc. Digital Research. Mid 1980s [Dahmke 1983].
DOS 3.3
Standard OS for Apple II Computers.
DOSPLUS
OS for the Tandy TRS-80. Substantial extension of TRSDOS, including support for double density disks. Micro Systems Software. Early 1980s [Kolya 1981].
86-DOS
Early version of MS-DOS. Seattle Computer Products, Late 1970s [Paterson 1983].
EUMEL
Multitasking OS for Z80, 8086, 68000, Z8000. Developed by GMD in Germany. Mid 1980s.
FLEX
A small OS for the 6809 and others. Technical Systems Consultants [Mini-Micro 1985].
GEM
Graphics OS environment for IBM-PC. Digital Research, Early 1980s.
GEOS
Graphics Operating System for Commodore 64, based on GEM. Commodore Business Machines, Inc. Mid 1980s.
HDOS
Heath Disk OS. Operating System for H-89 and other Heath Computers. Early 1980s [Jorgenson 1981, Pechura 1983].
K-DOS
An alternative OS for the Atari 400/800. Early 1980s [Leemon 1982].
LDOS
Extended version of TRSDOS for the TRS-80 (Z80). Logical Systems, Inc. Early 1980s [Daneliuk 1982].
Macintosh OS
MBOS/5
Multitasking version of BOS/5.
Microdisk Op Sys
OS for MS2000 using 1805. RCA Microsystems [Mini-Micro 1985].
Micropower/Pascal
A small Pascal Operating Environment for the LSI-11. Digital Equipment Corp. [Digital 1984].
MicroVMS
Version of VMS for the MicroVAX. Digital Equipment Corp. Mid 1980s.
MOS
p-code system for Z80, 8080, 8086, 68000. Volition Systems. [Mini-Micro 1985].
M/OS-80
Small OS for Z80. UTC/Mostek [Mini-Micro Systems 1985].
MP/M
Multi-user version of CP/M. Digital Research, late 1970's [Kildall 1981].
MP/M-86
Version of MP/M for 8086 family CPU. Digital Research, Early 1980s [Kildall 1981].
MP/OS
Version of AOS for the Data General Micro-Nova. Late 1970s [Zarella 1981].
MPX-32
OS for Gould Concept-32 computers. Early 1980s.
MS-DOS
Improved OS for 8086 family, based partly on CP/M. Newer versions somewhat similar to UNIX. MicroSoft Corp. Adapted as PC-DOS for IBM-PC. Late 1970's [Paterson 1983, King 1983].
MSX
Small ROM-based version of MS-DOS for Z80 home computers. MicroSoft Corp. Early 1980s.
MSX-DOS
Limited version of MS-DOS for the Z80. MicroSoft Corp. Early 1980s [Mini-Micro 1985].
MTOS
Multitasking, Multiprocessing OS for 8086 and 68000 families. Industrial Programming, Inc. Early 1980s [Mini-Micro 1986].
MULTIDOS
Disk Operating System for the Tandy TRS-80. Features ability to read and write various file formats. Cosmopolitan Electronics Corp. Early 1980s [Archer 1982].
MULTI-FORTH
A FORTH operating environment for the 68000. Creative Solutions [Mini-Micro 1985].
NEWDOS
An extended version of TRSDOS for the TRS-80. Apparat, Inc. Early 1980s [Kelly 1982].
OASIS
Original name for THEOS.
O/S
OS for 8086, 68000. Applied Systems. [Mini-Micro 1985].
OS/2
Operating system for IBM Personal System 2. IBM Corporation, Late 1980s [White & Grehan 1987, Letwin 1988].
OS-9
Small computer OS similar to UNIX, stripped down and with real-time capabilities. M68000 and 6809 systems, including TI Color Computer, Tandy, Dragon, others. MicroWare Corp. Mid 1980's [Bidmead 1984].
p-System
Support environment for UCSD Pascal, based on an abstract "p-machine." Developed at U. of Calif. at San Diego, now distributed by SofTech Microsystems. Late 1970s [Campbell 1983].
PC-DOS
For IBM-PC. Version of MS-DOS. Early 1980s [King 1983].
PCVMS
Small, inexpensive VMS lookalike. Wendin Corp. Mid 1980s.
Personal CP/M
ROM-based version of CP/M 2.2 for small home computers. Digital Research Inc. Early 1980s.
polyFORTH
FORTH environment for Z80, 8080, 8086, 6809, 68000, and PDP-11 families. FORTH Inc. early 1980s [Mini-Micro 1986].
ProDOS
Advanced operating system for APPLE computers. M6502 CPU [Campbell 1984, Moore 1984].
QDOS
Quick and Dirty Operating System. First version of 86-DOS, later MS-DOS. Early 1980s [Patteson 1983].
QDOS
OS for the British Sinclair QL. Power of UNIX, SuperBASIC command language, up to 20 concurrent tasks with windows. Early 1980s [WMSR 1984].
REX-80/80, REX-80/86
OS for 8080 and 8086. Systems & Software, Late 1970s [van der Linden & Wilson 1980, Mini-Micro 1985].
SCP-DOS
Early version of MS-DOS. Seattle Computer Products, Late 1970s.
SDOS
Operating System for 6809. Software Dynamics [Mini-Micro 1985].
SOS
Sophisticated OS for the Apple III. Late 1970s.
THEOS
Business oriented operating system for small computers. Versions for Z80, 8086, and 68000. Originally named OASIS and distributed by Phase One Systems. Now distributed by THEOS Corporation. Early 1980s [Stagner 1985].
TOS
Operating system for the Atari 520ST and 1040ST. Derived from Concurrent 68K.
TP/M
Version of CP/M for the Epson QX-10.
TRSDOS
Standard operating system for TRS-80 computers. Z80 CPU.
TurboDos
Enhanced multitasking version of CP/M for Z80 and 8086. Software 2000, Early 1980s [Fowler 1984, Bierman 1984].
ULTRADOS
OS for the Tandy TRS-80. Level IV Products. Early 1980s [Archer 1982].
UMD
OS for 8080, 6800, 68000, Z8000 series, and others. Boston Systems Office. [Mini-Micro 1985].
VERSAdos
MS-DOS compatible system for 68000. Motorola Corp., late 1970s [Glaser 1981].
VTOS
OS for the Tandy TRS-80. Virtual Technology. Early 1980s [Archer 1982].
Waterloo Port
PC-DOS version. Waterloo Microsystems Inc. Early 1980s [Mini-Micro 1986].
Windows
Graphical, cooperative multitasking operating environment for the IBM-PC, layered on top of MS-DOS. Microsoft, Early 1990s. Most widely used version is 3.1.
Windows for Workgroups
Windows NT
Windows 95
WIZRD
Small OS for the 6800. Wintek [Mini-Micro 1985].
ZRTS
Operating System for the Z8000. Zilog Corp, Late 1970s [Savitzky 1981, Zarella 1981].