ccrossword exercise

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Across
  1. 2. set of computer programs
  2. 5. science and technology concerned with the design, building, and use of engines, machines, and structures
  3. 6. type of engine that most cars have
  4. 7. electric potential difference
Down
  1. 1. a thing made for some kind of purpose
  2. 3. machinery and equipment developed by humans
  3. 4. a for-profit business organization