Fred Harris looks at some of the best games for the home micro - including those which involve more than mindlessly 'zapping' aliens - from the electronic version of "Trivial Pursuit' to a game that tests your knowledge of physics and allows you to design your own pin-ball machine. Ian McNaught-Davis tells the sad story of the Wingsail - an ingenious computer-controlled sail which when bolted to a ship saves a tenth of its fuel bill, but has almost ruined its inventor. And award-winning journalist Steven Arkell reports from the City of London on the technology, and the mistakes, behind the 'Big Bang'.