On the left, the cabinets of the SASS CP-677 computer.  Note the 1/4 inch tape reals atop the cabinet on the left.  The welded steel shelves in center frame support a paper tape reader and punch.  These were modified TRW-13x/Bunker-Ramo CP677 machines.  15 bit plus parity buses and registers.  Circuit cards were arranged across the rack in rows representing data registers.  One transistor flip-flop per card, with a little neon light indicating the state.  These things were fairly easy to keep adjusted and running.  These computers were developed specifically for Fleet Ballistic Missile submarine use.  The form factor for equipment racks for FBM use was generally fixed by the size of standard hatches.  Hence, the tall, skinny form factor.  The TRW-series computers were among the first transistorized ones used on Navy ships for that reason.