National Teaching and Learning Change ProgrammeInformation and Communication Technology:
Dictionary

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• front end
  In systems design, the back end is the part which deals with processing any input from the users, whereas the front end is the user interface.
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• full duplex
  Refers to the direction of data transmission. It may be in both directions at the same time, called duplex or full duplex; in only one direction at a time, called half duplex; or in one direction only, called simplex.
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• function
  Similar to a procedure, but it returns a single value.
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• function
  In a spreadsheet, a type of formula used to represent something that may be too complex or too long to expect an ordinary user to enter, or used for common tasks like adding the numbers in one column, e.g. SUM(A1:A15) adds all the values in cells A1 to A15.
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• function key
  One of a number of special keys which, when pressed, changes the effect of other keys on the keyboard. What these keys do will depend on the software, rather than the hardware, being used.
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• functional specification
  The functional specification describes exactly how the system will behave, showing what happens at each stage the of the system as each process is performed. It is usually part of the systems specification.
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• fuzzy logic
  In search procedures, a search using fuzzy logic will look for similarities to the search criteria, as well as exact matches, in order to compensate for spelling and other errors.