Five Retro Operating Systems You Can Run on the Raspberry Pi

Argh, le PET2001, mon tout premier ordinateur !

http://upload.wikimedia.org/wikipedia/commons/4/4a/Pet2001_ta.jpg

The COMMODORE BASIC Operating System was written by Bill Gates and Paul Allen from their fledgling Micro-Soft Corporation (later renamed to Microsoft Corporation). Commodore Basic was the only unlimited software license ever granted by Microsoft to any company for all products regardless of the number of copies used. Commodore went on to produce literally millions of machines with various forms of Commodore Basic and did not pay Microsoft a single cent beyond the initial licence purchase in 1976/7.

▻http://www.commodore.ca/commodore-products/commodore-pet-the-worlds-first-personal-computer