Algebraic HP calculators, hierarchy of operations.

[Rick314]

The HP 10bII+ allows setting "Chain" mode (the default, 2 + 3 * 4 = 20) or "Algebraic" mode (2 + 3 * 4 = 14). It is a non-RPN calculator except for specific 2-input functions. 100 INPUT 125 %CH = 25, but 2 INPUT 3 y^x = <pending input, no answer yet>. Also functions + - * / do not work with INPUT, but dDAYS, DATE, nCr, nPr, df,t<>P, INV df,t<>P do work with INPUT. Clear as mud!