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- cell
Cell is a spreadsheet term, referring to a single box in a spreadsheet grid. Cells are arranged in rows and columns. For example, cell B3 would refer to the cell where column B meets row 3. A cell contains either a number, text or a formula (or it can be empty). Cells also appear in tables, e.g. in word processors and web pages. 
- central processing unit (CPU)
The central processing unit (CPU) is the main part of the computer, consisting of the registers, arithmetic logic unit and control unit. Usually the central processing unit includes the main memory. It is sometimes called the central processor or processor. Many computers have more than one processor. A special form of central processing unit is the microprocessor which is used in microcomputers and small computerised devices, for example the control circuits of washing machines. - centred
Centred is where the text, or other characters such as numbers, are placed in the centre of the page (or part of a page, like a cell in a spreadsheet, or table in a web page), and so have the same left and right margins. - char
A data type representing a single character, for example, 'a'. - character
A character is one of a set of the symbols which can be represented by a computer. Characters can be letters, digits, spaces, punctuation marks, non-printing and control characters. - character data
Character data is a single character represented by the codes from the character set used by the computer. - character set
The set of symbols that may be represented by a computer at a particular time. These symbols are called characters and can be letters, digits, spaces, punctuation marks, and include non-printing, control characters. - chart
A chart is a graphical representation of data, e.g. line chart, bar chart, pie chart. Often found in spreadsheets. - chat
A program which allows internet users to communicate interactively with other users, in real time. - chat room
A live online meeting place, where participants can 'meet' to chat via their computers. - check box
A type of dialogue box which appears when information about a choice is needed, or when options have to be selected. In a check box, the feature is either activated if the box is marked or is not activated if the box is left blank. - check box
An area in a form which allows a user to select one or more options. - check sum
A validation check used when copying software to ensure it is copied without error. A check sum is formed by simply adding up all the instructions, treated as numbers, before and after copying. If the two check sums match, then the data has been copied correctly. - child node
A tree is a data structure where the data items can be thought of as occurring at different levels. There are links between items at one level and the items below at the next. The data items are usually called nodes with the links known as branches. A node may have any number of descendants but itself may only be the descendant of one other node. It is usual in computing to draw a tree diagram - child process
A new process created by an existing process. The new process is known to the pre-existing process as its child process. The pre-existing process is called the parent process. - chip
The popular name for an integrated circuit is a (silicon) chip; a solid state micro-circuit in which all the components (such as transistors and capacitors) are formed within a very thin slice of silicon. - clear (screen)
Most programming languages will have a command which clears the screen of whatever is currently displayed on it. - clear variables
Clearing a variable means to remove the existing value of a variable. - click
The act of pressing a mouse button, to perform some action. - clickable
Text or images which can be clicked. When clicked, the user is taken to another web page.
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