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Here in Spain, in the school and high-school is forbidden using programmable calculators in exams. Even on doing the "selectividad", a pre university huge exam

Here in Spain, in the school and high-school is forbidden using programmable calculators in exams. Even on doing the "selectividad", a pre university huge exam, is forbiden these type of calculators. I'm very happy with my old fx-85wa. It have all the advantages of a simple programmable calculator (natural math expressions and edit the formula that you typed), but can't store programs or functions, so isn't a programmable calculator. Plus works on a small lithium battery + solar cell. I only need to change the battery one time in this last 15 years.

kazinator 12y ago
Hmm. There could be a market for a "disruptive tech" in this segment: programmable calculators that look exactly like scientific non-programmable calculators, and behave that way to someone who doesn't know some (user-configurable) keystrokes to "unlock" the hidden power. When this is invoked, it changes the meaning of certain buttons, like say stats functions or whatever). There could be some connector on the circuit board for easy programming via your PC (say over USB). This would not be exposed unless the plastic is taken off. With that, you could conveniently cram the calculator full of useful code prior to an exam, then access it in the special mode. Now imagine this was done as a mod kit for several popular mass-produced calculators ...