An upgrade to Socket 2, it rearranged the pin layout and omitted one pin so that 3.3 V processors could not be plugged into older 5 V only sockets.
CPU socket | Socket 370 | Socket M | Socket 478 | Secure Socket Tunneling Protocol | tube socket | Socket P | Socket G34 | Socket FM1 | Socket AM2 | Socket 604 | Socket 479 | Socket 3 | Socket 2 |