> Good question... Calculus? Of course it has a long history with computing, but I would say that probably less than 10% of programmers outside scientific field

> Good question... Calculus? Of course it has a long history with computing, but I would say that probably less than 10% of programmers outside scientific fields use any calculus. Calculus is pretty useful in computer graphics and vision, if you want to understand what is going on there are integrals left and right. Audio processing and finance too.