BRIAN REDHEAD examines some of the implications of the new technological revolution for people in industry today. 4: On Line: Laser supermarket check-outs, new time clocks at British Leyland, and Viewdata terminals in the local garage are only the tips of a number of electronic icebergs-networks of information links which are beginning, for good or ill, to have a far-reaching effect on the high street and on white-collar jobs in industry.