@harrymuzz At my first job, the computer room temperature was controlled with double door air lock to enter. The computer was huge with punch card operators typing and huge floor to ceiling reel to reel tapes. The print outs were on large sheets of paper and took several runs for all the errors to be corrected. With programmers, inputters and clerks, there were about 8 staff. Nowadays a kid of 8 or 9 could do it all and more on a smartphone and 30 times quicker! Hard to believe but true.