Source : Free On-Line Dictionary of Computing

milliLampson
     
        /mil'*-lamp"sn/ A unit of talking speed, abbreviated mL.  Most
        people run about 200 milliLampsons.  The eponymous Butler
        Lampson (a CS theorist and systems implementor highly regarded
        among hackers) goes at 1000.  A few people speak faster.  This
        unit is sometimes used to compare the (sometimes widely
        disparate) rates at which people can generate ideas and
        actually emit them in speech.  For example, noted computer
        architect C. Gordon Bell (designer of the {PDP-11}) is said,
        with some awe, to think at about 1200 mL but only talk at
        about 300; he is frequently reduced to fragments of sentences
        as his mouth tries to keep up with his speeding brain.
     
        [{Jargon File}]