Mastodawn

Back in the day in the late 1980's, I wrote some PC software to replace the (by then) aged ADPI units that were used by CNC machines to store/restore their CNC programs.

Throw away the notoriously flakey ADPI serial cassette unit (I found a price list with a repair cost of $300 in 1988 - over 600 pounds in today's money), and hook it up to your "IBM compatible PC", and you never had to worry about those pesky cassette tapes ever again!