I used APL in university and later on during Y2K conversions (fun stuff), but found out much later on that APL was the de-facto language and interface to of one

I used APL in university and later on during Y2K conversions (fun stuff), but found out much later on that APL was the de-facto language and interface to of one of the first microcomputers - the MCM/70 [0] [0] https://www.historyofinformation.com/detail.php?id=4340 https://www.historyofinformation.com/detail.php?id=4340