Source : Free On-Line Dictionary of Computing

Socket 7
     
         A physical and electrical specification
        for the {x86 processor socket} matching the pins on {Pentium}
        {microprocessors} manufactured by {Intel}, and compatibles
        made by {Cyrix}, {AMD} and others.  Any {CPU} chip conforming
        to this specification can be plugged into any conforming
        {motherboard}.
     
        Supported processors include: 2.5V - 3.5V {Pentiums} 75-233
        MHz, AMD {K5} through {K6}, Cyrix {6x86} (and MX) P120 - P233.
     
        Socket 7 uses a {SPGA} socket, either a 296 pin {LIF} or a 321
        pin {ZIF} arranged as 37x37 or 19x19 (depending on who you
        speak to!).
     
        See also {Super 7}.
     
        Intel's {Pentium II} processor uses {Slot 1} mounting.
     
        [Pin-out?]
     
        (1999-08-29)