<Li> KERNAL (default OS on Commodore 64) </Li> <Li> MERLIN for the Corvus Concept </Li> <Li> MorphOS (Amiga compatible) </Li> <Li> MSP by Fujitsu (successor to OS - IV), now MSP / EX, also known as Extended System Architecture (EXA), for 31 - bit mode </Li>

How many types of os are there in the world