Sixth in a series of ten programmes about computers in society with Fred Harris.
In a London squat, two musicians built themselves a drum kit from cheap and freely available parts - silicon chips. They realised they had a winner on their hands, and joined up with a marketing company to sell large numbers to eager buyers. But attempts to build on this success have not gone so smoothly.

(For accompanying notes, send a cheque or PO for £1.50 to [address removed].)