Cool site that details the introduction of the PC. They even got a nice article on the introduction of WIndows among others.
I managed to find some nice pics of my first Atari PC. I had one of them when I was between 5-6 years old

http://members.fortunecity.com/pcmuseum/atari130.htm
It's funny, I always thought my logic teacher was joking when he said the first PC had switches for inputs and LED's for outputs

http://members.fortunecity.com/pcmuseum/altair1.htm
Yet, the Altair 8800 actually existed!!
Stef