Reading millions of those 80 column Hollerith cards into the 2540, cannibalizing the punch to keep the reader reading. And it was nothing like 52 card pick-up when one of the programs burst into the air! Opening the drawer of the 2314 DASD drawer as the disk unit was still spinning down, un-mounting and sliding that payroll pack on the floor as you mounted a new disk and changed the address plug. Manually loading the tapes on the 2401, no easy loaders or cartridges. Loading continuous 14"x11" forms on the 1403 impact printer without getting ink on you. And then the 360/40 with the 1052 console, a powerful Selectric. The system had a whole 128k of storage with a built in C.E. cabinet for their smocks. It was nicknamed the pizza oven because it was so hot inside and there was just enough room on top of CPU, inside the housing, to slide a pizza in to keep warm. In case anyone is interested IBM is hosting their own 100th year celebration at http://www.ibm.com/ibm100/us/en/