Global positioning system (GPS) apparatus; Apparatus for collecting encoded data for supply to computers; Apparatus for controlling computer programmes; Apparatus for controlling the operation of machines (computer); Apparatus for data communications between computers; Apparatus for receiving information from a computer; Apparatus for use in communications between computers; Audiovisual display apparatus adapted for use with computers; Audiovisual display apparatus for use with computers; Broadband data interconnecting computer installations; Communication devices for linking computer networks; Communications electronics for computers; Communications processing computer software; Components for computers; Computer apparatus for transmitting data; Computer apparatus for use in local area networks; Computer apparatus for use with computer networks; Computer interface units; Computer programs (downloadable software); Computer programs for data processing; Computer software; Computers; Electric devices for transmission of data between computers; On-board computers; Accelerometers integrated with global positioning apparatus; Antenna positioners; Apparatus for displaying the position of vehicles; Control apparatus for determining position; Mechanisms for use in positioning systems (electric); Numerical position indicating apparatus; Position fixing apparatus; Position sensing devices; Present position indicator apparatus; Relative position indicating apparatus