Yep, I've still got a few slide rules.
I can't find my 6" rule (always in the top pocket of the lab coat in a well turned out lab guy!) or my 6" cylindrical slide rule - equivalent to something like a 5' slide rule from memory.
Does anyone remember their teacher standing at the front of the class with a huge linear slide rule about 5 feet long so that the whole class could follow what was being taught?
I also have a set of 4 figure and a set of 6 figure maths 'tables' somewhere.
Memories.
Back to topic. I recall that Clive Sinclair sold his computer business to Alan Sugar when he ran into severe financial problems. Hence A.M.S. Trading (Amstrad) got into computers. I did a presentation to Alan Sugar long ago. He had a really good feel for what people would and wouldn't buy - and at what price. Hopeless technically, but a bloody sharp business person. He listened carefully, handled the technology and said "I can sell this for £49.99. How much can you make it for?".
Colin