List of Microsoft operating systems

This is a list of Microsoft written and published operating systems. For the codenames that Microsoft gave their operating systems, see Microsoft codenames. For another list of versions of Microsoft Windows, see, List of Microsoft Windows versions.

MS-DOS

 * See MS-DOS Versions for a full list.

Windows Mobile

 * Windows Mobile 2003
 * Windows Mobile 2003 SE
 * Windows Mobile 5
 * Windows Mobile 6

Xbox gaming

 * Xbox system software
 * Xbox 360 system software
 * Xbox One and Xbox Series X/S system software

Unix and Unix-like

 * Xenix
 * Nokia X platform
 * Microsoft Linux distributions
 * Azure Sphere
 * SONiC
 * Windows Subsystem for Linux
 * CBL-Mariner

Other operating systems

 * MS-Net
 * LAN Manager
 * MIDAS
 * Singularity
 * Midori
 * Zune
 * KIN OS
 * Nokia Asha platform
 * Barrelfish