stuff

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Across
  1. 2. protects the internal components of a computer
  2. 5. In terms of computing, what does CPU stand for?
Down
  1. 1. 'OS' computer abbreviation usually means?
  2. 3. Firefox,safari,and explorer are types of what?
  3. 4. Who is the current chairman for Microsoft?
  4. 6. which company works on IOS software?