https://dfarq.homeip.net/ibm-pc-introduced-august-12-1981/?utm_source=rss&utm_medium=rss&utm_campaign=ibm-pc-introduced-august-12-1981 David L. Farquhar on technology old and new, computer security, and more Sun, 01 Feb 2026 18:30:04 +0000 hourly 1