Source : Free On-Line Dictionary of Computing

Plastic Pin Grid Array
     
         (PPGA) The package used for certain
        {Intel} {Celeron} {processors}.  PPGA processors fit into
        {Socket 370} {motherboard} sockets.
     
        The Plastic {Pin Grid Array} packaging is similar to that used
        on {Pentium} processors.  The {silicon} {core} is covered by a
        {heat slug} that faces down toward the {motherboard}.
     
        The Celeron 300A to the 533 use a PPGA package.  The Celeron
        566 onward use a {FC-PGA} package.
     
        Celeron processors are also available in {Slot 1} {SEPP}
        packaging.
     
        (2000-08-26)