Definitions

2. a piece of text, such as a page number or a title, that appears at the top of every page in a document or book
4. a circuit board (= small piece of electronic equipment) inside a computer that allows it to receive and show moving images
8. a small rectangle of black lines of different widths that contains information that can be read by a computer
10. dots per inch: the number of dots (= small spots) of ink a printer, etc., can produce in each line measuring one inch. An image with more dots looks clearer
11. the main part of a computer, which contains the CPU (= the part of a computer that controls all the other parts)

1. a very large, powerful computer with a lot of memory that many people can use at the same time
3. the form in which a computer program is originally written before it is changed into computer language
5. the screen area of a personal computer when no programs are being used, or the top of a desk
6. a large amount of information stored in a computer system in such a way that it can be easily looked at or changed
7. the part of a computer that performs operations on the information that is put into it
9. digital versatile disc or digital video disc: a disc used for storing and playing music, films, or information
12. the smallest unit of information in a computer, represented by either 0 or 1