Gary Kildall is approached by IBM for the use of CP-M for their OS. Kildall accepts.


The IBM PC is released. It proves to be one of the most successful PCs ever made, introducing the concept of a "personal computer." However, many companies reverse-engineer its BIOS, leading to a number of clones coming out on the market. However, unlike OTL Bill Gates, Gary Kildall was a bad businessman. He only supplied to IBM, leading to a number of different OSs coming out, with no standard apparent. Microsoft proves to supply their clone of CP-M, MS-DOS, to many


The IBM-PC surpasses the Apple II as the best-selling computer. Apple introduces the Apple Lisa, the first OS with a graphic interface and a mouse. Its high cost keeps it from rising to dominance.


IBM-PC has 58% of the market under their control. Digital Research Inc. now feels confident to send its OS to various companies like HP and Dell, but they already have CP-M clones in their control. However, Kildall already broke the deal with IBM, leading them to release a PC with their own CP-M clone, IBM-OS. Digital Research, Inc. is crushed.


The Commodore Amiga is released. It proves to be popular and jump-starts the use of Commodore. However, Commodore was obscure until the 1990s.


Microsoft, under the leadership of the prominent businessman Bill Gates, decides to release a graphic OS, MS-GOS. This proves to be revolutionary, as the low cost makes HP and Sony, two companies which use Microsoft OSs, dominant players in the playing field. Various other companies release MS-GOS clones, leading to the "Standards Wars."

Apple fires CEO Steve Jobs, who founds NeXT Inc.


The Macintosh becomes a major player in the playing field. Its graphics exceed that of MS-GOS and its clones. However, it competes with NeXT Computer and slowly the Macintosh's use declines. MS-GOS receives new updates and is improved. Digital Research releases a GOS clone, after they start to fall into obscurity.


Microsoft releases MS-GOS 2.0 and it gets even better sales than MS-GOS 1.0. This is attributed to the growing personal use market for computers. Apple releases an equivalent Macintosh, but its sales are very low. Apple was descending into a hole.

CP-M is finally discontinued as interest in text-based OSs declines heavily.


Microsoft releases MS-GOS 2.1. It proves to be the last in the MS-GOS line. However, it was significantly less powerful than its competitors.