Regardless of hardware capabilities, I remember the TI-89 capable of solving some computer algebra problems that I couldn't get even Mathematica at the time to

Regardless of hardware capabilities, I remember the TI-89 capable of solving some computer algebra problems that I couldn't get even Mathematica at the time to solve. TI calculators definitely do seem like dinosaurs in many ways, but the TI-89's CAS was seriously impressive even when disregarding the pitiful hardware it was running on.