Source : Free On-Line Dictionary of Computing

Athlon
     
         (K7) {AMD}'s 7th generation {x86} {processor},
        released in June 1999.
     
        Athlon uses a {Slot A} {motherboard} and is not compatible
        with {Slot 1} motherboards.
     
        [Details?  Reference?]
     
        (1999-08-05)