System software reference
Operating Systems
From MS-DOS and Classic Mac OS to Windows 11, Linux, BSD, mobile platforms, RTOS, and mainframes.
Open OS comparison tool →Desktop
PCs, laptops, workstations — Windows, macOS, Linux
Server
Datacenter UNIX, Linux distros, Windows Server
Mobile
Smartphones and tablets — Android, iOS
Embedded / RTOS
Automotive, industrial, IoT — QNX, VxWorks
Mainframe
IBM Z and banking core systems
Vintage
DOS, Classic Mac OS, OS/2, BeOS, AmigaOS
Modern & actively supported
Search all →Operating System
IPadOS 18
Apple · 2024
- Family
- iPadOS
- Type
- Desktop
- Version
- [±]
- Released
- 2024
Operating System
LineageOS 21
LineageOS · 2024
- Family
- Android
- Type
- Mobile
- Kernel
- Linux
- Version
- 21
- License
- Open source
- Released
- 2024
Operating System
NetBSD 10
NetBSD Foundation · 2024
- Family
- BSD
- Type
- Embedded
- Kernel
- NetBSD
- Version
- 10
- License
- Open source
- Released
- 2024
Operating System
OpenBSD 7.5
OpenBSD Project · 2024
- Family
- BSD
- Type
- Server
- Kernel
- OpenBSD
- Version
- 7.5
- License
- Open source
- Released
- 2024
Operating System
Fedora 40
Fedora Project · 2024
- Family
- Linux
- Type
- Desktop
- Kernel
- Linux
- Version
- 40
- License
- Open source
- Released
- 2024
Operating System
Ubuntu 24.04 LTS
Canonical · 2024
- Family
- Linux
- Type
- Desktop
- Kernel
- Linux
- Version
- 24.04
- License
- Open source
- Released
- 2024
Operating System
VisionOS
Apple · 2023
- Family
- Unix-like, Darwin, BSD
- Type
- Desktop
- Kernel
- Hybrid, XNU
- Version
- [±]
- License
- Proprietary software
- Released
- 2023
Operating System
HarmonyOS 5
Huawei · 2023
- Family
- OpenHarmony-based
- Type
- Desktop
- Kernel
- Microkernel (HongMeng Kernel)
- Version
- 6.1.0.117 / 20 April 2026; 41 days ago (2026-04-20)
- License
- Commercial software, Proprietary software except for open-source components
- Released
- 2023
Operating System
Proxmox VE 8
Proxmox · 2023
- Family
- Linux
- Type
- Server
- Kernel
- Linux
- Version
- 8
- License
- Open source
- Released
- 2023
Operating System
ReactOS 0.4.14
ReactOS Foundation · 2023
- Family
- Windows-like
- Type
- Desktop
- Kernel
- NT-like
- Version
- 0.4.14
- License
- Open source
- Released
- 2023
Operating System
IOS 17
Apple · 2023
- Family
- iOS
- Type
- Mobile
- Kernel
- Hybrid, XNU
- Version
- [±]
- License
- Proprietary software
- Released
- 2023
Operating System
Android 14
Google · 2023
- Family
- Android
- Type
- Mobile
- Kernel
- Linux
- Version
- 14
- License
- Open source
- Released
- 2023
Vintage & classic systems
Operating System
UCSD Pascal
University of California, San Diego, SofTech, Pecan · 1977
- Family
- P-code operating systems
- Type
- Desktop
- Kernel
- P-code virtual machine
- Version
- IV.2.2 R1.1 / December 1987; 38 years ago (1987-12)
- Released
- 1977
Operating System
CP/M-86
Digital Research · 1978
- Family
- CP/M
- Type
- Desktop
- Kernel
- CP/M
- Version
- 1.1
- License
- Proprietary
- Released
- 1978
Operating System
Apple DOS
Apple Computer · 1978
- Family
- Apple DOS
- Type
- Desktop
- Kernel
- Monolithic kernel
- Version
- 3.3 / 1980; 46 years ago (1980)
- License
- Apple Software License Agreement
- Released
- 1978
Operating System
Xenix
Microsoft, SCO, HCR, Logica · 1980
- Family
- SVR2.3, BSD
- Type
- Desktop
- Kernel
- Monolithic kernel
- Version
- System V R2.3.4 / August 12, 1991; 34 years ago (1991-08-12)
- License
- Proprietary
- Released
- 1980
Operating System
Apple SOS
Apple Computer · 1980
- Family
- SOS
- Type
- Desktop
- Kernel
- Monolithic kernel
- Version
- 1.3 / January 1, 1980; 46 years ago (1980-01-01)
- License
- Apple Software License Agreement
- Released
- 1980
Operating System
Holborn 9100
Holborn · 1981
- Family
- Other
- Type
- Desktop
- Released
- 1981
Operating System
MS-DOS
Microsoft · 1981
- Family
- DOS
- Type
- Desktop
- Kernel
- Monolithic
- License
- Proprietary, MIT License
- Released
- 1981
Operating System
Microsoft Windows
Microsoft · 1985
- Family
- Windows
- Type
- Desktop
- Kernel
- Windows NT family: Hybrid Windows Embedded Compact/Windows CE: Hybrid or Monolithic Windows 9x and earlier: Monolithic (MS-DOS and VMM32)
- Version
- Windows 11 26H1 (10.0.28000.2179) (May 26, 2026; 5 days ago (2026-05-26)[1]) [±] 25H2 (10.0.26200.8524) (May 26, 2026; 5 days ago (2026-05-26)[2]) [±]
- License
- Proprietary commercial software
- Released
- 1985
Operating System
Apple ProDOS
Apple Computer · 1986
- Family
- SOS
- Type
- Desktop
- Kernel
- Monolithic kernel
- Version
- 1.6 / June 14, 1988; 37 years ago (1988-06-14)
- License
- Apple Software License Agreement
- Released
- 1986
Operating System
A/UX
Apple Computer · 1988
- Family
- Macintosh, UNIX System V
- Type
- Desktop
- Kernel
- Monolithic kernel
- Version
- 3.1.1 / 1995; 31 years ago (1995)
- License
- Proprietary
- Released
- 1988
Operating System
A/ROSE
Apple Computer · 1988
- Family
- Macintosh, Embedded operating systems
- Type
- Desktop
- Released
- 1988
Operating System
Apple GS/OS
Apple Computer · 1988
- Family
- GS/OS
- Type
- Desktop
- Kernel
- Monolithic kernel
- Version
- GS/OS v4.02 (System Software 6.0.1) / May 6, 1993; 33 years ago (1993-05-06)
- License
- Apple Software License Agreement
- Released
- 1988