a game engine defined for executives

Florent THIERY  :

I am seeing executive brief on my iPhone defining game engine, p.8 :

http://seneludens.utdallas.edu/seneludens.pdf

Carrying my iPhone in my pocket or rather in my sox (soon to be a ragae song by a promotional banjo player), I am snatching at this executive brief when I can't do full blown studies with acrobat pro "mind amplifier".