A long time ago now, in the 1990 or 1991 timeframe, I bought an ATT 3B1. It was my first true Unix machine.
I could tell you lots about it, but there is a Wikipedia page up for it already (the ATT 3B1).
The interesting message is the perspective of time.
Some nut actually preserved for eternity the startup or boot process on video. Look at how long this takes and listen to how loud that hard drive is: