When I took multivariable calculus in tyool 2007, we were forbidden from using our calculators. "You can use a slide rule or an abacus" and I did indeed bring t

When I took multivariable calculus in tyool 2007, we were forbidden from using our calculators. "You can use a slide rule or an abacus" and I did indeed bring the former to one exam, but of course the problems were written in such a way that you didn't actually need it.