Re: Memories... @travellingman
I'm really not sure how much of an asset the Cambridge Programmable would have been in an exam over a normal scientific calculator.
It did not have any stored memory capability, so you would either take it in powered on, and risk the battery running out, or remember any program that you wanted to use, not that much of a problem, however, with only 32 (or was it 36) programmable steps.
I did use a high-function Commadore SR4190R in a physics exam at university to do some linear regression that I could not remember the formula for. Worked out the results, then reverse-engineered the calculations to fit so I could present my 'workings'. Non-programmable scientific calculators were allowed, but I suppose it was cheating (a bit). I don't actually think that that exam added much to my overall degree.