IBM 3740, circa 1973
3740 was indeed the system, but the actual data entry equipments were
3741 (single operator) and 3742 (dual operator). These were both desk
type units, with the latter dual station model being the size of a small
barge. Possibly one of IBM sillier offerings...imagine DEC making a
dual VT100.
Some 3741s (mods 2 and 4, I think) have a sync communications port (BSCA),
and could talk to some of the processors. Some larger S/3s have these as
standard, giving the processors a floppy (for diagnostics).
William Donzelli
aw288(a)osfn.org