There was a time in the 1960s when computers took up entire rooms. By the early 1970s, there was at least some floor space for the programmers to move around on, but they still didn't have video screens. Instead, they had to use switches on the front of the machine to instruct it, and received their readings from lights that flickered on and off. Later they had the luxury of reading the answers on punchcards and then on... More >>>