National Teaching and Learning Change ProgrammeInformation and Communication Technology:
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• client
  In a network, a client is a computer which asks for services from a server, for example, a file server or print server.
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• client side
  On the internet, the client side is the user's computer, rather than the web server, and refers to when scripts, for example, are executed by the user's computer rather than the web server.
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• clip
  A short section of film or sound stored in digital format, e.g. a video clip is a small file containing a video sequence.
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• clip art
  While computer graphics software allows the user to draw their own illustrations, many publishers offer computer disks full of professionally-drawn pictures that can be edited to suit an individual user
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• clipboard
  In a cut (or copy) and paste operation, the data is held in a temporary storage area called the clipboard. Data held in these storage areas will normally remain there until overwritten by new data, so allowing an exact copy of the original to be pasted in more than one place.
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• clock speed
  The clock speed (or clock rate) is the frequency at which the clock generates pulses. The higher the clock rate, the faster the computer may work. The speed is expressed in megahertz (MHz) (millions of cycles per second).
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• close window
  This closes the window in which a program is running.
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• cluster
  A group of computers in the same physical area, possibly on a network. A cluster sharing resources will usually be less formally organised than most networks. A cluster controller is the computer acting as controller for the cluster.
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• co-processor
  A secondary processor in a computer that handles some of the tasks that otherwise the CPU would be processing, e.g. a maths co-processor.
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• coaxial cable
  Coaxial cable is the same kind of cable that is used for connecting a television aerial to a television set. It has two conductors. One is a wire down the centre of the cable, which may be a single strand, insulated from the second, which is made up of many strands braided around the insulation for the inner wire.
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• codec
  Short for coder/decoder. It is the component that processes a video/audio signal for storage and subsequent processing in a computer, and may be implemented as software or hardware. While all codecs perform the same function, they are not equivalent; in order to recreate the video signal for playback to a TV set or video recorder, the coded data must be decoded by the same codec that was used originally. It is an important component of a video capture card.
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• collate
  The ability of a printer to print pages in the correct order for binding.
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• colour palette
  The range of distinct colours that a computer system can produce. No computer system will be able to produce every possible shade of colour and the palette is the total set of shades available. Most computers have a palette of sixteen million colours, though some programs will use fewer.
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• colour printer
  A printer which uses coloured inks to print in a range of colours.
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• column
  Where data is arranged vertically, for example, a column of data in a spreadsheet, or a page of word processed data which is arranged into two or more columns.
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• comma separated value (CSV) (1)
  A file or table in which the fields are separated (delimited) by commas.
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• comma separated value (CSV) (2)
  A file or table in which the fields are separated (delimited) by commas.
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• command
  An instruction given to a computer.
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• command line interface
  A form of user interface in which the user types commands for the computer to carry out. The command is usually restricted to a single line of text, which may consist of any sequence of commands.
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• command prompt
  Appears when the operating system, e.g. DOS, is waiting for a command to be entered.