Acoustic receivers for telephonic communication with computers; Apparatus for collecting encoded data for supply to computers; Apparatus for computer aided design; Apparatus for computer aided manufacture; Apparatus for computer numerical control of machines; Apparatus for controlling computer programmes; Apparatus for controlling the operation of machines (computer); Apparatus for linking computers; Apparatus for linking computers into networks; Apparatus for use in communications between computers; Articles adapted for use in the ducting of computer cables; Assembler programmes for computers; Audiovisual display apparatus adapted for use with computers; Audiovisual display apparatus for use with computers; Cabinets adapted to hold computers; Cases adapted for computers; Components for computers; Computer based control apparatus for assembly lines; Computer cables; Data being electrically recorded for computers; Electrical cables for connecting computers