dexter2 :
I am quite new to the tech community, and also am quite young, so I don't think I was around when CPUs had pins on them instead of the motherboard. Just curious, as I couldn't seem to find an answer anywhere else on the web, including Wikipedia.
CPUs come in all sorts of interfaces. The ATMega 328p still comes in old style DIP packages with pins on the side, the Pentium II and some Pentium III chips came in slots, and most ARM chips are soldered directly into the boards that use them!
Unless you were born last week though, you've probably seen a computer with pins, most AMD ones have them after all.