Computer hardware and software

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Across
  1. 2. a small computer that can work with a battery and be easily carried
  2. 4. the set of keys for operating a computer or typewriter, or the set of letters that you can click on to write on a smartphone or tablet
  3. 6. a computer program that is used, for example, when doing financial or project planning. You enter data in rows and columns and the program calculates costs, etc. from it.
  4. 7. able to be added to a computer system so that it can do more things
Down
  1. 1. the words, pictures, etc. shown on a computer screen
  2. 3. the desk and computer at which a person works; one computer that is part of a computer network
  3. 5. to look for and remove the faults in a computer program