What are the four key functions of a computer system?

What are the four key functions of a computer system?

  1. a) input, processing, output & storage
  2. b) keyboard, display, memory & disk drive
  3. c) bits, bytes, words & OSI
  4. d) word processing, spreadsheets & database

From the BB Assistant Maintenance Engineer 2011 – Preliminary exam, question 3 of 5.

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