Crossword Puzzel

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Across
  1. 3. Protects an operating system’s kernel
  2. 5. operating system Loads program into _________
  3. 6. Another term for CPU
  4. 7. It is a service of an operating system
  5. 9. Interface between user and hardware
  6. 10. open source software used in smartphones and tablets
  7. 11. L in CLI Stands for ?
Down
  1. 1. logical extension of a multiprogramming
  2. 2. strict deadline based operating system
  3. 3. _______refers to putting data of various I/O jobs in a buffer
  4. 4. physical components of computers
  5. 8. Core program of OS