Operating System

Apple ProDOS

Apple Computer · 1986

SOS

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

IPadOS 26

Apple · Unknown year

Windows

Family

Windows

Type

Desktop

Version

[±]

Operating System

IPadOS 18

Apple · 2024

iPadOS

Family

iPadOS

Type

Desktop

Version

[±]

Released

2024

Operating System

IPadOS 17

Apple · Unknown year

iPadOS

Family

iPadOS

Type

Desktop

Version

[±]

License

Proprietary software

Operating System

IPadOS 16

Apple · Unknown year

Unix-like, Darwin, BSD

Family

Unix-like, Darwin, BSD

Type

Desktop

Kernel

Hybrid, XNU

Version

[±]

License

Proprietary software

Operating System

IPadOS 15

Apple · Unknown year

Unix-like, Darwin, BSD

Family

Unix-like, Darwin, BSD

Type

Desktop

Kernel

Hybrid, XNU

Version

[±]

License

Proprietary software

Operating System

IPadOS 14

Apple · Unknown year

Unix-like, Darwin, BSD

Family

Unix-like, Darwin, BSD

Type

Desktop

Kernel

Hybrid, XNU

Version

[±]

License

Proprietary software

Operating System

IPadOS 13

Apple Inc. · 2019

Unix-like, Darwin, BSD

Family

Unix-like, Darwin, BSD

Type

Desktop

Kernel

Hybrid, XNU

Version

[±]

License

Proprietary software

Released

2019

Operating System

Apple DOS

Apple Computer · 1978

Apple DOS

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

MS-DOS

Microsoft · 1981

DOS

Family

DOS

Type

Desktop

Kernel

Monolithic

License

Proprietary, MIT License

Released

1981

Operating System

IPadOS

Apple · 2019

Unix-like, Darwin, BSD

Family

Unix-like, Darwin, BSD

Type

Desktop

Kernel

Hybrid, XNU

Version

[±]

License

Proprietary software

Released

2019

Operating System

Microsoft Windows

Microsoft · 1985

Windows

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

NSDOS

Unknown · Unknown year

DOS

Family

DOS

Type

Desktop

Operating System

IBM PC DOS 2000

IBM · 1998

DOS

Family

DOS

Type

Desktop

Kernel

DOS

Version

2000

License

Proprietary

Released

1998

Operating System

MS-DOS 6.22

Microsoft · 1994

DOS

Family

DOS

Type

Desktop

Kernel

DOS

Version

6.22

License

Proprietary

Released

1994