My dad had a computer that was outdated by the commodore 64. I cannot remember what the make was. Anyway he wrote a software program to inventory my brothers entire store on. He ran it out of memory on more than one ocassion!
In 1965 I was enrolled in a resident Technical College in Chicago. For 'extra credit', I assisted in tearing down and removing a "computer" in the science lab. It took up an entire room, roughly 60 feet by 40 feet in size. This monster was paper punch-ribbon driven and had 10,200 VACUUM TUBES* and mechanical relays as the sequencing and switching media.
This thing had it's own 80,000 BTU air conditioning unit and was so noisey when running that we had to wear hearing protectors. The "so called" memory on this thing was about the same as a modern pocket calculator!!
For those who are too young to know what vacuum tubes are, look at the link below... JUST DON'T TOUCH! They run with a surface temperature of over 225 degrees F.