Apparatus for collecting encoded data for supply to computers; audiovisual display apparatus adapted for use with computers; audiovisual display apparatus for use with computers; compact disc players for use with computers; computers; data being electrically recorded for computers; data input apparatus for use with computers; data processing apparatus for use with computers; data recording materials for use with computers; data storage apparatus for computers; disc (disk) drives for computers; disc drives (for computers); disc drives for use with computers; disk drives (for computers); display apparatus for use with computers; display terminals for use with computers; electric devices for transmission of data between computers; electric leads for use with computers; electrical cables for connecting computers; electrically recorded data for computers; electronic data apparatus for use with computers; electronic data input apparatus for use with computers; electronic data output apparatus for use with computers; electronic devices for the transmission of data between computers; electronic memories for computers; electronic memory units for computers; home computers; memories for computers; memories for use with computers; memory devices bearing programmes for use with computers; monitors for use with computers; personal home computers; storage discs for use with computers