Windows

[Sarge]

MacOs - by Vinamra28

Windows 10 - by E-EnerG and ursoalph

Windows 10 - by DahbixLP

Windows XP - by Agent_14

Windows Vista - by nobita10

Windows 95 - by M_Copulos

Computer (unamed) - by fd268

Game OS - by E-EnerG

ArcadeOS - by Cat10847

Cboy - by E-EnerG

MAKECODE-DOS - by E-EnerG

Computer Simulator v0.2 - by LaserFoxPro

TerminalOS - by SilentGaming

Juno Kernel - by Erik44b

Do keep in mind this is an old list and probably missing a lot of the newer stuff people made… I think it goes back to 2021?