Sheet 4

1. a group of people who exchange information and contacts for professional or social purposes.
3. a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols.
4. involving or relating to the use of computer technology.
5. facts and statistics collected together for reference or analysis.
7. reasoning conducted or assessed according to strict principles of validity.
10. a combined device for modulation and demodulation, for example, between the digital data of a computer and the analogue signal of a phone line.
13. a distinct section of a piece of writing, usually dealing with a single theme and indicated by a new line, indentation, or numbering.
14. a machine that processes something.
15. a computer's capacity for storing information.
16. a flat, thin circular object.
19. using radio, microwaves, etc. (as opposed to wires or cables) to transmit signals.
20. a device used for observing, checking, or keeping a continuous record of something.

2. a device at which a user enters data or commands for a computer system and which displays the received output.
6. an opening in the wall or roof of a building or vehicle, fitted with glass in a frame to admit light or air and allow people to see out.
8. an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
9. closely and neatly packed together; dense.
11. an electronic document in which data is arranged in the rows and columns of a grid and can be manipulated and used in calculations.
12. a small handheld device which is moved across a mat or flat surface to move the cursor on a computer screen.
17. a flat panel or area on an electronic device such as a television, computer, or smartphone, on which images and data are displayed.
18. the recording, reproducing, or broadcasting of moving visual images.