He also described a binary calculator using marbles. From De progressione Dyadica: This [binary] calculus could be implemented by a machine (without wheels)… provided with holes in such a way ...

Students in MATH 1110 will typically be going on to MATH 1180 (for eventual calculus) or MATH 2000 (brief calculus). The TI-83 (not Plus), TI-86, TI-92 and the TI-92 Plus are no longer manufactured.

But one of the most useful features of the old iOS calculator app didn’t make it to the new iOS 18 version: repeating ...

Ah, the poor calculator: so plain, yet so essential, like the Swiss Army knife of the academic world. The thing is, as I have now learned, not all calculators are created equal. So let me now take you ...