Apparently a company in Texas was still using the IBM 402 in 2012, which works just as you describe. Swappable trays of wired patch panels for programming: htt

Apparently a company in Texas was still using the IBM 402 in 2012, which works just as you describe. Swappable trays of wired patch panels for programming: https://www.pcworld.com/article/249951/if-it-aint-broke-dont-fix-it-ancient-computers-in-use-today.html https://www.pcworld.com/article/249951/if-it-aint-broke-dont...