Revolution OS

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Across
  1. 6. Operating system kernel made by Linus Torvalds
  2. 7. License used in GNU/Linux
  3. 9. Closed source software
  4. 11. A general purpose operating system built on top of the Linux kernel
  5. 13. Computer operating system developed at AT&T's Bell Labs
  6. 15. Surname of Microsoft founder
  7. 16. Beginner's All-purpose Symbolic Instruction Code
  8. 17. In a world without walls and fences, who needs ... and Gates
  9. 18. a collection of software that manages computer hardware resources and provides common services for computer programs
  10. 20. American multinational software company providing open-source software products to the enterprise community
  11. 21. Open ... Movement
Down
  1. 1. Computer program that is used to test other programs
  2. 2. Surname of an American software freedom activist and computer programmer
  3. 3. Someone who makes innovative customizations or combinations of retail electronic and computer equipment
  4. 4. Hack which is also recursive acronym
  5. 5. One of the largest and most influential companies in the personal computer industry
  6. 8. Company which merged with Red Hat
  7. 10. Computer program (or set of programs) that transforms source code into binary form
  8. 12. Free ... Foundation
  9. 14. The extensible, customizable, self-documenting, real-time display editor
  10. 19. The central component of most operating systems