CPA crossword

1. The largest single digit number in the decimal system.
5. Indicates a set of values between two values.
7. A mathematical operation to find the sum of 2 numbers.
8. We use this device to communicate with the computer.
9. A set of program codes to do something.
13. An abbreviation for operating system.
15. May be music of voice.
16. Some games use these to show different scenes.
19. To rotate a shape 360 degrees about an axis of revolution so as to get a 3D model.
20. Action buttons and URLs are examples of ______.
21. Communications between computers may be ______ through cables.

2. These media elements are used as characters or backgrounds in an animation.
3. A boundary condition in animation.
4. A visual representation of data.
6. An abbreviation for denial of service.
10. One way to protect an account on a website is to use this.
11. This software collects your data without your knowledge.
12. One way to check if two objects are touching each other is to detect this.
14. An unpredictable number is a _________ number.
17. A commonly used key to remove typing errors.
18. We do this to check whether our program works properly.
21. A type of malicious program.