Questions about computers

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Across
  1. 2. Type of computer responsible for most of the world's financial transactions.
  2. 3. A type of computer that delivers the most computing power.
  3. 4. A computer component that is a relic of the past, often included in educational material. Often found in pictures of laptops.
  4. 6. Company that heavily popularized the concept of personal computers. Was once the largest computer company on the planet.
  5. 7. (Bonus) Popular operating system for server environments.
Down
  1. 1. A type of computer that can be found in a car
  2. 5. Communication protocol used by many mobile computers to connect to the internet.