I just bought a $100 calculator.

Normally I’m in one of two regimes: $15 calculators or computer software (Matlab, Mathematica, etc.). I infrequently need something inbetween.

However, for some tests I now do, and the quick and dirty TI 30XIIS has hit its limits. Those limits aren’t excessive naming symbols. I got a TI 83+, which apparently isn’t one of the current really good graphing calculators. For me, it’s night and day. It can invert complex functions with a press of a button. I don’t slog through radian/degree conversions. The thing does full on matrix multiplication without dropping negative signs. It’s like seeing dawn.

Still, for a hundred bucks, it better knock my socks off.

It did.