Modern technology is so quiet and efficient, so here are some reminders of how noisy computing used to be:
Number 1: The dot-matrix printer.
http://www.youtube.com/watch?v=Muajxx8vUV4
Number 2: Rotary dial phones.
http://www.youtube.com/watch?v=8hUAQtqlhT4
Number 3: Tape-loading games
Number 4: Modems
Number 5: Floppy drives