person or thing that serves. People who give food to others at a table.

To scramble data into a code so it is hard to read.

acting in way that would be recommended. To suggest what would be helpful.

action of helping or doing work for someone. Maintenance of machineries so it runs well, e.g. cars. To help or do work for someone, e.g. in a store.

person who uses computers to gain unauthorized access. People accessing computers without permission.

Machine for storing data, accessing the internet.

To selfishly take advantage of or treat badly.

Causing trouble. Question to show understanding of a math concept.

in space separating things. Among two or more people who share something.

person who is very knowledgeable about or skilful in particular area. Skillful people with special knowledge.

(of container or covering) accidentally losing or admitting contents through hole or crack. (Liquid) to go out of/get in through crack/opening.

programs and other operating information used by computer.

Method or way of sending or receiving information. To direct energy or feelings into something.

To broadcast by using signals to a radio/TV. To transfer a disease between people.

set of related web pages located under single domain name. Collections of webpages in one location.