It’s hard to be an underdog operating system when you’re produced by a Fortune 10 company. But somehow, OS/2, IBM’s heir apparent to MS-DOS and PC DOS, managed to be exactly that. It’s the operating system everyone who was around in the 90s heard of, but few understood. And it has a reputation for being something nobody used. So it surprises people sometimes that IBM ended sales of OS/2 in December 2005. Most people assume it was much earlier.

David Farquhar is a computer security professional, entrepreneur, and author. He has written professionally about computers since 1991, so he was writing about retro computers when they were still new. He has been working in IT professionally since 1994 and has specialized in vulnerability management since 2013. He holds Security+ and CISSP certifications. Today he blogs five times a week, mostly about retro computers and retro gaming covering the time period from 1975 to 2000.










