October 27, 1982 is the date on the IBM 5150 Revision B BIOS, making this week as good of a time as any to look over the differences between the Revision A and Revision B IBM PC 5150. What are the advantages and disadvantages of a Revision A vs Revision B IBM PC 5150? Maybe more importantly, is one of them more rare than the other?

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.










