fanfold paper ... reseating boards in computer (the heat made them shrink/expand and they needed to be pushed in again) ... hex conversion by hand ... single-st

fanfold paper ... reseating boards in computer (the heat made them shrink/expand and they needed to be pushed in again) ... hex conversion by hand ... single-step button on console ... hand punching paper tape one hole at a time (not one row, one hole) ... tty ribbons ... 8 inch floppies ... key sequences for bootstrap ... JCL statements ... 73-80 column sequence numbers on punched cards ... overnight turnaround ... floating point magic ... modem switches ... n-8-1 ... voltage vs current tty links ... uppercase only code ... EBCDIC ... binary coded decimal ...