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Re:VisiCalc: Information from Its Creators, Dan Bricklin and... by jhoechtl on Thursday August 19, 2021 @07:26AM (#28232543)
http://danbricklin.com/history/vcexecutable.htm

> The original VisiCalc program that ran on the IBM PC in 1981 still runs on today's PCs.

Now that is impressive compatibility.

Re:VisiCalc: Information from Its Creators, Dan Bricklin and... by cube00 on Thursday August 19, 2021 @08:22AM (#28232880)
Looks like that page was last updated in 2009 so might need a small tweak that it runs today provided you use something like DosBox (at least on 64-bit Windows 10)