Slot 1
An interface introduced by Intel in 1997 that used with the Intel Celeron, Intel Pentium II, and Intel Pentium III processor that connects to the computer like an expansion card. Although these processors did make it easier to install a processor into the computer they were more expensive and cumbersome and are no longer being used for new computers. Below is a picture of what the Slot 1 would look like on the motherboard, see the SECC definition for a picture of the processor that plugged into this slot.
Also see: Processor definitions, SECC, Slot, Slot A, Slotket