Editing List of operating systems (section)

===Microsoft Corporation===
* [[Xenix]] (licensed version of Unix; licensed to [[Santa Cruz Operation|SCO]] in 1987)
* [[MS-DOS]] (developed jointly with IBM, versions 1.0–6.22)
** [[Z-DOS]]
** [[MS-Net]]
** [[MS-DOS 4.0 (multitasking)]]
** [[MS-DOS 7]]
** [[MSX-DOS]] (developed by MS Japan for the MSX 8-bit computer)
** [[DOS/V]]
* [[OS/2]] 1.x (developed jointly with IBM until version 1.3)
** [[LAN Manager]]
* [[Microsoft Windows|Windows]] (16-bit and 32-bit preemptive and cooperative multitasking, running atop MS-DOS)
** [[Windows 1.0]] (Windows 1)
** [[Windows 2.0]] (Windows 2 – separate version for i386 processor)
** [[Windows 2.1]] (Windows/286, Windows/386)
** [[Windows 3.0]] (Windows 3)
** [[Windows 3.1x]] (Windows 3.1)
** [[Windows for Workgroups 3.1]] (Codename Snowball)
** [[Windows 3.2]] (Chinese-only release)
** [[Windows for Workgroups 3.11]]
** [[Windows 95]] (codename Chicago – Windows 4.0)
** [[Windows 98]] (codename Memphis – Windows 4.1)
** [[Windows ME|Windows Millennium Edition]] (Windows ME – Windows 4.9)
* [[Windows NT]] (Full 32-bit or 64-bit kernel, not dependent on MS-DOS)
** [[Windows NT 3.1]]
** [[Windows NT 3.5]]
** [[Windows NT 3.51]]
** [[Windows NT 4.0]]
** [[Windows 2000]] (Windows NT 5.0)
** [[Windows XP]] (Windows NT 5.1)
** [[Windows Server 2003]] (Windows NT 5.2)
** [[Windows Fundamentals for Legacy PCs]] (based on Windows XP)
** [[Windows Vista]] (Windows NT 6.0)
** [[Windows Azure]] (Cloud OS Platform) 2009
** [[Windows Home Server]] (based on Windows Server 2003)
** [[Windows Server 2008]] (based on Windows Vista)
** [[Windows 7]] (Windows NT 6.1)
** [[Windows Server 2008 R2]] (based on Windows 7)
** [[Windows Home Server 2011]] (based on Windows Server 2008 R2)
** [[Windows 8]] (Windows NT 6.2)
** [[Windows RT]]
** [[Windows Phone 8]]
** [[Windows Server 2012]] (based on Windows 8)
** [[Windows 8.1]] (Windows NT 6.3)
** [[Windows Phone 8.1]]
** [[Windows Server 2012 R2]] (based on Windows 8.1)
** [[Windows 10]] (Windows NT 10.0)
** [[Windows 10 Mobile]]
** [[Windows Server 2016]]
** [[Windows Server 2019]]
** [[Windows 11]] (Windows NT 10.0)
** [[Windows Server 2022]]
** [[Windows Server 2025]]
* [[Windows CE]] (OS for handhelds, embedded devices, and real-time applications that is similar to other versions of Windows)
** [[Windows CE 3.0]]
** [[Windows CE 5.0]]
** [[Windows Embedded CE 6.0]]
** [[Windows Embedded Compact 7]]
** [[Windows Embedded Compact 2013]]
** [[Windows Mobile]] (based on Windows CE, but for a smaller form factor)
** [[Windows Phone 7]]
** [[KIN OS]]
* [[Xbox system software]]
** [[Xbox system software#Original Xbox system software|Xbox (first generation) system software]]
** [[Xbox 360 system software]]
** [[Xbox One system software]]
** [[Xbox system software#Xbox One and Xbox Series X/S software|Xbox Series X/S system software]]
* [[Singularity (operating system)|Singularity]] – A research operating system written mostly in [[managed code]] ([[C Sharp (programming language)|C#]])
* [[Midori (operating system)|Midori]] – A managed code operating system
* [[SONiC (operating system)|SONiC]]
* [[Azure Sphere]]
* [[CBL-Mariner]]