When it comes to the question of how many IBM PCs were sold, the numbers I hear are all over the place. I’ve heard 3 million, 60 million, and several numbers in between. In this blog post, I’ll uncover the reason there are so many conflicting numbers.
But if I tell you IBM initially only expected to sell 1,000 units in its first six months after its August 12, 1981 release, you probably won’t believe me.

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.










