Computer science

3. Set of keys used to type and enter information on the computer
4. A computer language for creating documents to be displayed on the internet
7. A collection of data arranged for ease and speed of search and retrieval (also called "data bank")
9. Use of the memory and computing capacity of computers and servers distributed around the world and linked by a network
12. A pointing device moved across a mat and used to make on-screen selections
16. Ouput device that displays words or pictures
17. The process of transferring software/information from a server to a computer
18. An application used to keep unauthorized users from accessing parts of a network or computer
19. A system for connecting computers in different areas of a country or the world
20. The case that contains the CPU, memory, the power supply, disk drives and all other hardware that are in an internal format.

1. Produces hard copies of computer output
2. Start (a computer)
4. Located inside the system unit and used to store programs and most data
5. The background image of a display screen, on which windows, icons and other graphical items appear
6. Device which connects computers or computer systems to the internet
8. The part of a computer that controls all the other parts (also known as a "processor")
10. Reads CD/DVD disks
11. The opposite of word n°8
13. A program which is capable of copying itself and typically corrupts the system or destroys data
14. Used to produce audio output
15. Small piece of equipment that connects to a computer or electronic equipment to copy and store computer data