DA's background

Just out of curiosity, what's DA's background, before becoming a productivity guru? His system and usage of concepts like FIFO and LIFO (frequently used in programs stacks) insinuate that he has some programmers/computer program. Anyone know details to this? Thanks.
 
He used to work at a gas station. Prior to that he studied karate. He is a part-time minister with some church. He had some 34 jobs before coming to his thang.
 
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