:-) I might still have a set of the manuals somewhere. The bottom line is that the only electrical devices were a motor, a single electromagnet for printing, and a rotating commutator on the keyboard. One man could carry one- unlike the Olivetti I owned once which had been carefully "reimagined" to circumvent the patents and which replaced every pressed-metal part with a machined-and-bolted subassy which could easily drift out of alignment... I heard that the maintenance course was 12 weeks.
It's difficult to imagine terminals which predate microprocessors, but "glass teletypes" with varying degrees of sophistication and ingenuity go back to the 1960s.
@Re-searcher: you /really/ don't want to get me going on this stuff :-)
MarkMLl