The weekly look at the world of information technology with Lesley Judd and Fred Harris. Customised chips - complex and specialised chips for specific needs - used to be very expensive. But now there is a way of producing them cheaply. In an exclusive interview Sir Clive Sinclair gives an insight into past successes and failures and looks forward with new plans for the next generation of computers. Four- and 5-year-olds are now getting hands-on experience of computers in nursery classes.