IBM PC celebrates 25th anniversary

DOS 1.0 Running

DOS 1 was such a crude and simple operating system as compared to later versions or even CP/M. It was, however, easy to learn and starting from 1.0 meant that I only needed to learn a bit of new stuff with each iteration.

DOS 1.0 did have a nasty math bug, though, that was fixed by a patch - version 1.05. I've got a copy of that as well. IBM never officially released that version, however. It was just a bridge version until 1.10 could be shipped with the fix and some new features.

Reprinted with permission from Vintage-Computer.com

About Bill Detwiler

Bill Detwiler is Managing Editor of TechRepublic and Tech Pro Research and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop supp...

Free Newsletters, In your Inbox