The Top 100 PC Tech Innovations of All Time
http://www.maximumpc.com/article/the_100_greatest_tech_innovations_of_all_time?page=0%2C0

Found this few minutes ago ... and it seems pretty interesting.

USB is titled as the top innovation. Right at this moment I have a Bluetooth Mouse, my Windows Mobile, Thumb Drive, External 500 GB Hard Disk and my USB Fridge (will tell ya'll about this later) plugged in. So i have no doubt .. USB deserves to be on the top. It's good to see Windows XP in the 5th place. Also there are 9 other innovations in this list which are from Microsoft.

In the 12th place there is the Mouse .... but its not looking fancy like the mouses we see today .. have a look at it.

Anyways I couldn't find the selection criteria or anything related on this. But the list is awesome ... it'll give you a quick peak at the history.