Slide rules wouldn't be any use today - you have to be able to add and subtract using pen and paper.....
My old boss once remarked that when he was a very junior stressman and his mistakes cost the company a few hundred, he was given a large circular slide rule, but now he was TD and his mistakes might cost millions he only had a six inch rule.
Last edited by Owain Glyndwr; 7th Jun 2013 at 16:24.
Reason: change of emphasis