Before computers (which, honestly, has only been the last 20-30 years), Accountants used paper and pencil to maintain financial records. There were adding machines and other tools to help ensure accurate mathematical functions as well.
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1. You can use computers to learn new things.
Intel Core i3 mobile processor as of 2010, but anytime before that, expect an Intel.
What sort of tasks are you refering to? is it manufacturing or databases or what?
While I have no idea what a "delta person" is, I would expect them to use computers simply because just about anybody uses computers nowadays.
The leading use of computers is e-mail