Operating System

An operating system is software that manages computer and software resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function. For functions such as input and output and memory allocation, the operating system acts as an intermediary between programs and the computer hardware, although the application code is usually executed directly by the and frequently makes a system call to an OS function or be interrupted by it. Operating systems can be found on many devices that contain a computer from cellular phones and video game consoles to supercomputers and web servers. The operating system has many categories :


The Categories of Operating Systems :


Operating Systems by Companies


 


Operating Systems by Non-Proprietary (Not owned by any company)


  •  MINIX
  • Plan 9 from Bell Labs
  • Inferno
  • Plan B
  • Unix
  • Xinu
  • BSD
  • FreeBSD
  • DragonFlyBSD
  • Darwin
  • GhostBSD
  • PC-BSD
  • NetBSD
  • OpenBSD
  • Bitrig GNU
  • Linux
  • Android x86
  • Cray Linux Environment
  • illumos
  • OpenIndiana
  • Nexenta OS
  • SmartOS
  • RTEMS
  • Syllable Desktop
  • Univention Corporate Server
  • VSTa
  • FMI/OS
  • Plurix
  • TUNIS
  • Amoeba
  • Croquet
  • EROS
  • HelenOS
  • House
  • ILIOS
  • CapROS
  • Coyotos
  • L4
  • Mach
  • Nemesis
  • Spring
  • THE multiprogramming system
  • V (Operating System)
  • Cosmos
  • FreeDOS
  • Haiku
  • ITS
  • MonaOS
  • osFree
  • OSv
  • Phantom OS
  • ReactOS
  • SharpOS
  • TempleOS
  • Redox OS

Disk operating systems (DOS)


  •  86-DOS
  • PC DOS
  • MS-DOS
  • Concurrent CP/M-86 3.1
  • Concurrent DOS 3.1-4.1
  • Concurrent PC DOS 3.2
  • DOS Plus 1.2
  • Concurrent DOS 8-16
  • Concurrent DOS 286 1.x
  • FlexOS 1.00-2.34
  • FlexOS 186
  • FlexOS 286
  • Siemens S5-DOS/MT
  • IBM 4680 OS
  • IBM 4690 OS
  • Toshiba 4690 OS
  • FlexOS 386
  • IBM 4690 OS
  • Toshiba 4690 OS
  • Concurrent DOS 386
  • Concurrent DOS 386/MGE
  • Multiuser DOS
  • CCI Multiuser DOS
  • Datapac Multiuser DOS
  • Datapac System Manager 7
  • IMS Multiuser DOS
  • IMS REAL/32
  • IMS REAL/NG
  • Concurrent DOS XM
  • DR DOS
  • Novell PalmDOS
  • Novell DR DOSStarTrek
  • Novell DOS 7
  • Caldera OpenDOS 7.01
  • Dell Real Mode Kernel
  • Caldera DR-DOS
  • DR-DOS “WinBolt”C
  • OEM DR-DOS
  • FreeDOS
  • ProDOS
  • PTS-DOS
  • TurboDOS
  • DESQview+
  • DESQView/X

Network operating systems


  •  Banyan VINES
  • Cambridge Ring
  • Cisco IOS
  • CSIRONET
  • CTOS
  • Data ONTAP
  • Enterprise OS
  • ExtremeWare
  • ExtremeXOS
  • Fabric OS



Generic, commodity, and other


  •  BLIS/COBOL
  • Bluebottle
  • BS1000
  • BS2000
  • BS3000
  • FLEX9
  • GEM
  • GEOS
  • JavaOS
  • JNode
  • JX
  • KERNAL
  • MERLIN
  • MorphOS
  • MSP
  • NetWare
  • Oberon
  • OSD/XC
  •  OS-IV
  • Pick
  • PRIMOS
  • Sinclair QDOS
  • SSB-DOS
  • SymbOS
  • Symobi
  • TripOS
  • TurboDOS
  • UCSD p-System
  • VOS
  • VM2000
  • Visi On
  • VPS/VM
  • ANDOS
  • CSI-DOS
  • KMON
  • MK-DOS



Hobby


  •  AROS
  • AtheOS
  • Syllable Desktop
  • BareMetal
  • DexOS
  • DSPnano RTOS
  • EmuTOS
  • EROS
  • HelenOS
  • LSE/OS
  • MenuetOS
  • KolibriOS
  • S-OS



Embedded




  •  DIP DOS
  • Embedded Linux
  • Android
  • Angstrom distribution
  • Familiar Linux
  • Mæmo
  • MeeGo
  • OpenZaurus
  • webOS
  • Inferno
  • iOS
  • Magic Cap
  • MS-DOS
  • NetBSD
  • Newton OS
  • Palm OS
  • PEN/GEOS
  • PenPoint OS
  • Plan 9 from Bell Labs
  • PVOS
  • Symbian OS
  • Windows CE
  • Pocket PC
  • Windows Mobile
  • Windows Phone
  • DSPnano RTOS
  • iOS
  • iPod software
  • ipodlinux
  • iriver clix OS
  • RockBox
  • BlackBerry OS
  • Embedded Linux
  • Access Linux Platform
  • Android
  • bada
  • Firefox OS
  • Openmoko Linux
  • OPhone
  • MeeGo
  • Mobilinux
  • MotoMagx
  • Qt Extended
  • Sailfish OS
  • Tizen
  • Ubuntu Touch
  • webOS
  • PEN/GEOS, GEOS-SC, GEOS-SE
  • iOS
  •  Palm OS
  • Symbian platform
  • Windows Mobile
  • BlackBerry 10
  • AlliedWare
  • AirOS
  • CatOS Systems
  • Cisco IOS
  • DD-WRT
  • Inferno
  • IOS-XR
  • IronWare
  • JunOS
  • LibreWRT GNU/Linux-libre
  • OpenWrt
  • RouterOS
  • ScreenOS
  • Timos
  • FTOS
  • RTOS
  • Contiki
  • ERIKA Enterprise
  • eCos
  • NetBSD
  • uClinux
  • MINIX
  • NCOS
  • freeRTOS
  • OpenEmbedded
  • pSOS
  • QNX market
  • REX OS
  • RIOT
  • ROM-DOS
  • TinyOS
  • ThreadX
  • UbiquiOS
  • DSPnano RTOS
  • Windows Embedded
  • Windows CE
  • Windows Embedded Standard
  • Windows Embedded Enterprise
  • Windows Embedded POSReady
  • Wind River VxWorks Small footprint
  • Wombat OS
  • brickOS
  • leJOS