Talking of calculators, only last night I was talking to a young fellow at work, relating the tale of my old electronics tutor.

Yep, back in the early 70's*, when I were a wee lad at college, he would spatter the board with equations/formulas and then get out his 6" slide rule to solve them. He was convinced they would never be able to produce a calculator that would replicate all it's functions.

Amazing to think that today there's as much, if not more, computing power in your average scientific calculator, than was available to man on the moon.

*Bibble, Bobble. I was there when Hereford United beat Newcastle.