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Univac Digital Trainer - [ The first computer I ever used. (1968) The UDT was totally useless for anything other than training in machine language programming, a bizarre specialty even in those days. It was 'state of the art' technology - transistors instead of vacuum tubes. - PSC ]

An IBM Key Punch machine which operates like a typewriter except it produces punched cards rather than a printed sheet of paper. -- I use to have a love/hate relationship with this machine. I used in it High School 1977-79, College for computer programming (1980-81), and up to 1990 while working with computers in the Air Force.

Teletype Model 33 - [ I was qualified (in theory at least) to work on these. In the U.S. Navy, they had a reputation for being bulletproof (reliable). I don't really know that for sure, because I never saw one that was heavily used. But they were a big seller in both the military and civilian versions for many years, and eventually enjoyed an active used market for computer hobby nerds. - PSC]

Mashablefrom Mashable

50 Things Replaced by Modern Technology

50 cosas que los diseñadores (y la mayoría de las personas) han dejado de hacer por culpa de los avances tecnológicos vía www.paredro.com

Shugart SA 400 minifloppy Disk Drive - [ The FIRST 5.25" floppy disk drive (1977). By today's standards it's totally laughable (measly 100Kbyte capacity & slow), but very useful for hobby computers and early PCs. I tested it thoroughly for Honeywell Information Systems, and it performed perfectly. It annoyed me that most people (even the other engineers) would take one look at a mini-floppy drive and call it "cute" - PSC]