What A-Level computing course does capacitance affecting voltage phases? In fact, the A-Level computing course I did (AEB) didn't have much of the interesting stuff at all. It was all data-flow diagrams, list types, etc. Dull things that probably have no relevance to technicians :-)
Nor any relevance to productive computing either. The only flow diagrams I have drawn was while teaching O, A & (Australian) TEE computing, because the syllabus required it, although I have once or twice drawn one when debugging something very nasty. But if I ever move into management I expect I'll be drawing lots of flow diagrams so as to occupy all that empty time between arriving at work and leaving work. -- Christopher Dawkins, Felsted School, Dunmow, Essex CM6 3JG 01371-820527 or 07798 636725 cchd@felsted.essex.sch.uk