Rules to which users agree, to reduce the misuse of computer systems. Often found on social networking/collaborative sites.

A register of the CPU in which intermediate arithmetic and logic results are stored.

A step-by-step procedure for solving problems that can be followed by humans and computers.

Initial testing done by the programmer.

A digital circuit in the CPU used to perform arithmetic and logic operations.

Software designed to prevent, detect and remove malware.

Software that helps users perform particular tasks.

Data passed to a sub-program (subroutine) by the main program.

A data structure that contains many items of data of the same type. The data is indexed so that a particular item of data can be easily found.

A program that translates assembly language into machine code.

Giving a value to a variable.

Confirmation that a user’s password has been entered correctly.

A copy of data that is made in case the original data is lost or damaged. It can be used to restore the original data.

The mount of data that can fit through an internet connection. It is measured in bits per second (bps). This indicates the number of bits of information that can fit down the line in one second. K bps means thousands of bits per second; M bps means millions of bits per second.

Each place value is ten times bigger than the place to its right.

Each place value is two times bigger than the place to its right.

Second stage of testing done by a selected group of users to give feedback about how well a program works.

Either 1 or 0. Computers can only communicate in 0s and 1s; series of 0s and 1s represent the codes for various instructions and data.

The number of bits that are conveyed or processed per unit of time.

An optical disk that enables the recording, rewriting and playback of high-definition video and storing of large amounts of data. It has more than five times the storage capacity of traditional DVDs and can hold up to 25 GB on a single-layer disc and 50 GB on a dual layer disc.

A data type, having two values usually denoted as true and false.

Test in which the highest or lowest acceptable values are entered; these help check any logical errors that may have been introduced using the <= and >= operators.

A high-speed connection to the internet.

A trial and error method used by application programs to decode encrypted data such as passwords.

A simple sorting algorithm that repeatedly steps through the list to be sorted, compares each pair of adjacent items and swaps them if they are in the wrong order.

Electrical connectors carrying data from one component to another or a number of tracks on a printed circuit board (PCB) fulfilling the same function.

Group of eight bits.