Computer

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Across
  1. 4. - The basis of any equipment without which nothing works
  2. 5. - an output device that displays information in pictorial or text form.
  3. 6. - input device
Down
  1. 1. - the largest vendor of computer software in the world
  2. 2. - global system of interconnected computer networks
  3. 3. - a hand-held pointing device that detects two-dimensional motion relative to a surface.
  4. 5. - apple computer