Another old school pop in.
First computer was an IBM Model 5150. I remember playing "sopwith" fondly, even though it was hard to land.
Later on I used USB sticks to load emulators at school, CPS-I through CPS-III through network play
and Nintendo 64. Super Smash Bros 64 was played by three people on one keyboard making everyone
in the computer lab very annoyed. That was epic. Donkey Kong for the win.
Here to learn more about the newer emulation techniques.