Slot 1 <hardware, standard> The physical and electrical specification for the connector used by some of {Intel}'s {microprocessor} cards, currently (August 1999) the {SEPP} {Celeron} and the {SECC} {Pentium II}. Slot 1 is a departure from the square {ZIF} {PGA}/{SPGA} sockets used by {Pentium} and earlier processors, the processor being mounted on a card, with a 242-lead edge-connector. The Slot 1 specification allows for higher {bus rates} than {Socket 7}. Slot 1 motherboards use the {GTL+} {bus protocol}. See also {Slot 2}, {Slot A}. [bus rates?] (1999-08-04)