Computers are my hobby since 1979. In that period there was no trace of DOS and CP/M was ruling. The first home computers started to appear. Sinclair, Commodore, Amstrad, Acorn, Atari. Just to name a few. And how about "Jet Set Willy", "Pssst!" and "Attack of the Mutant Camels"?
Here are some links to help you visit memory lane:
http://www.the-underdogs.org/company.php?offset=0&id=167&sort=name
http://www.emuunlim.com
http://www.retro-games.co.uk/museum/museum.htm
http://www.arhs.net/related/emulator+games
http://directory.google.com/Top/Computers/Emulators
You know what I really would like? "Jet Set Willy" that runs on my Nokia.
What was your favorite game back in those days?