PCCraft

PCCraft is the name of a computer operating system designed by Bill Jiabs, CEO and Head Design of tech company PCSoft. It is the most used computer operating system in the world, being installed on 70% of all laptop and desktop computers.

Iterations
Note that all currently supported versions of PC (PCCraft 4 and newer) are still receiving updates.

Upcoming systems.
PCCraft 8 is an upcoming operating system to be released in mid 2075. It was announced during the 2074 PCSoft Tech event. It will be a free upgrade to all users running PCv13 (PCCraft 4) or later.