People who are more than casually interested in computers should have at least some idea of what the underlying hardware is like. Otherwise the programs they write will be pretty weird.
The guy who knows about computers is the last person you want to have creating documentation for people who don't understand computers.
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Lighter computers and lighter sensors would let you have more function in a given weight which is very important if you are launching things into space and you have to pay by the pound to put things there.
