Earlier this year, [Dan Maloney] went inside mechanical calculators. Being the practical sort, [Dan] jumped right into the Pascaline invented by Blaise Pascal. It couldn’t multiply or divide. He then ...

When I took calculus at night school with three nerdy high school friends, graphing calculators did not exist. Johns Hopkins University mathematics professor Stephen Wilson is happy for me. He says ...

I’ve never forgotten my college professor for integral calculus, Mr. Whatever-his-name-was. I can still see him, standing at the front of the lecture hall, shirtsleeves rolled up, wielding a piece of ...