OS Crossword

5. The very first OS.
6. Any computer program that is intended for end-user user.
10. A computer program embedded on a chip on a computer's motherboard that recognizes and controls various devices that make up the computer.
11. The main circuit board in any electronic system.
12. The central part of an operating system.
14. A human readable plain text that can eventually result in controlling the behavior of a computer.
15. A set of instructions and documentation that tells a computer what to do or how to perform a task.
17. The primary processor in a given computer.
19. A request for the processor to prevent currently executing code.
21. What happens when a computer starts.

1. A software that directly executes encoded logic.
2. What the user uses on an operating system to make the computer do tasks.
3. Software that translates computer code written in one programming language into another language.
4. An operating system for computers made by Apple Inc.
7. The most popular operating system used in mobile devices.
8. The most popular operating system used in desktops and laptops.
9. A subdiscipline within the field of information security. It focuses on protecting computer software, systems and networks.
13. The process by which a computer or virtual machine interprets and acts on the instructions of a computer program.
16. Kind of a computer program that helps a computer to interact with other machines or with people.
18. What stores information, such as data and programs, for immediate use in the computer.
20. The most popular open source operating system.