Computers / Software / Operating Systems /
Operating systems (OSs) do many things: it is the block of software that runs in the memory of a computer which mediates between the hardware below and application(s) above; provides consistent access to various hardware for user programs such as applications and utilities; multiplexes hardware resources between two or more processes, programs, users; provides some common services to all software via an application programming (or protocol) interface (API); allocates memory and storage; schedules tasks. On this page, OSs are arranged in three groups and levels: 1) Top group: issues spanning multiple unrelated OSs. 2) Middle group: types or classes of OS, or OSs for which there are more than one instance of an OS of this name/type, an OS family. 3) Bottom group: specific OSs, individual instances; there is only one OS of this name/type, with its own category, and non-trivial, useful running code (more than a boot loader), and/or a body of worthwhile readings. It cannot be merely a new project with no significant code.
Sub Categories
- 2K
- A-UX
- AIX
- Ada
- Amiga
- Amoeba
- Amstrad
- Apple II
- Archy
- AtheOS
- BIOS
- BSD
- BSD-OS
- BeOS
- Boot Managers
- CPM
- Capability
- Choices
- ChorusOS
- Closed Source
- Consumer Information
- Croquet
- DLXOS
- DOS
- DR-DOS
- Darwin
- Data General
- DexOS
- Digital Unix
- Directories
- Distributed
- DragonFly BSD
- EPOC
- EROS
- Education
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- Erlang
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- FreeBSD
- FreeDOS
- FreeRTOS
- Functional
- GEOS
- GNU Hurd
- Graphic Subsystems
- Guides
- HP-UX
- Handheld
- History
- Hybrid Kernel
- IBM
- IRIX
- Inferno
- Java
- KolibriOS
- L4
- Language-based
- Linux
- Lisp
- LynxOS
- MINIX
- ML
- MPE
- Mac OS
- Mach
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- MicroC-OS
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- Microsoft Windows
- Midrange
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- MorphOS
- NeXT
- Nemesis
- NetBSD
- NetWare
- Network
- Nucleus
- OS X
- OS-2
- OS-400
- OS-9
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- OpenBSD
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- POSIX
- PURE
- Palm OS
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- Pick
- Plan 9
- Programming
- QNX
- Quality of Service
- REAL-32
- REBOL-IOS
- RISC OS
- RTEMS
- ReactOS
- Realtime
- Reflective
- Research
- RxDOS
- SCO
- Self
- Single Address Space
- SkyOS
- Smalltalk
- Solaris
- Squeak
- Submicrokernel
- Syllable
- Symbian
- THEOS
- TI-99 4A
- TRON
- TUNES
- ThreadX
- TinyOS
- Tru64
- Unix
- V2 OS
- VMS
- VSE
- VSTa
- VxWorks
- Xinu
- eCos
- x86
- z-OS
- z-VM
Related Categories
Ranked Sites
Operating System Sucks-Rules-O-Meter
The web-based operating system quality and approval metric.5
1,446,789
NA
1,510
5
349
OSNews: Exploring the Future of Computing
Weblog style online magazine on operating systems and computing environments. Daily updates, reader forum with many comments.6
20,248
NA
11,400,000
46,300
26
Convergence International
The non-Wintel user group, supporting Acorn, Amiga, Apple, ARM, Be, NCs, PowerPC, Psion, Unix and other alternative operating systems. Services include a non-Wintel news summary.4
24,300,403
NA
94,400,000
316
3
1
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