WHAT DO YOU KNOW ABOUT COMPUTERS?

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Across
  1. 2. the most important device for handling computer operations
  2. 3. the main circuit board with key parts of the computer
  3. 5. a typical input device that moves the cursor on the screen
  4. 7. a technology that superimposes three-dimensional virtual images on real images or backgrounds
Down
  1. 1. a worldwide network of computer networks
  2. 2. writing a program code using computer language
  3. 3. a device that stores computer processing results and data
  4. 4. a computer system modeled after human intelligence
  5. 6. a software to run computers efficiently