Computing words

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Across
  1. 2. Another way of representing binary, a way of representing negative numbers (4-10)
  2. 4. Include System software, Utility software and Application software (4-2-9)
  3. 6. A basic method for detecting if an odd number of bits has been switched by accident (6)
  4. 7. Interface which includes small pictures or graphics (3)
  5. 8. Sends the actual data to or from CPUs to actual devices (7)
  6. 11. Temporarily holds data whilst a new instruction is fetched (6)
Down
  1. 1. A way of showing how the finished product might look (11)
  2. 3. Non-volatile storage that is not under the direct control of CPU (9-7)
  3. 4. Three versions, first is alpha (7)
  4. 5. Base 8 numbers (5)
  5. 9. International version of ASCII (7)
  6. 10. Descended from from punch cards and corresponds to 6 bit binary coded decimal (6)