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Licenses
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System types
operating system
operating system
935
operating systems
Operating system
Developer
First release
License
MacOS Sonoma
Apple Inc.
—
—
MacOS Ventura
Apple Inc.
2022
—
Maemo Leste
—
—
—
Magic Cap
General Magic
1994
—
MagicSix
—
—
—
MASTAR
STMicroelectronics
—
—
Mastercam
—
—
—
McKernel
RIKEN
—
GNU General Public License, version 2.0
Mcube Kernel
—
—
2-clause BSD License
MDOS
—
—
—
MEDINA
T-Systems International GmbH
—
—
MenuetOS
—
—
proprietary license
,
GNU General Public License, version 2.0
Meta Horizon OS
Meta Platforms
—
—
Mezzano
—
—
MIT License
Michigan Terminal System
University of Michigan
1967
—
Micro T-Kernel
T-Engine Forum
—
—
MicroBSD
—
—
BSD licenses
MicroC/OS-III
—
—
—
MicroDOS
—
—
—
MicroOS
—
—
—
Microsoft Forefront
—
—
—
Microsoft Windows 98 Second Edition
Microsoft
—
—
MIDAS
Microsoft
—
—
MIDIbox Operating System
—
—
—
MidnightBSD
—
2007
BSD licenses
Midori
Microsoft
—
—
MikeOS
—
—
BSD licenses
Mikros
—
—
—
MilaX
—
—
Common Development and Distribution License
MineHarmony OS
Huawei
,
CHN Energy
—
—
Minimal Linux Live
—
—
—
MINIX 3
Andrew S. Tanenbaum
—
BSD licenses
Minoca OS
—
—
GNU General Public License, version 3.0
MiNT
—
—
—
Miosix
Federico Terraneo
2009
GNU General Public License
Miracle Linux
Cybertrust
—
—
Miraculix
—
—
freeware
MirageOS
Thomas Gazagnaire
—
ISC license
MirOS BSD
—
—
BSD licenses
Miru directory server
—
—
—
MkLinux
Free software movement
,
Open Software Foundation
—
GNU General Public License
MNOS
—
—
—
Mobian
—
—
—
Molinux
—
—
GNU General Public License
MonaOS
—
—
MIT License
MONECS
Monash University
—
—
MOS
—
—
—
Motoblur
Motorola Mobility
—
—
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