The HP-37s scientific calculator?

[trojdor]

Any replacement needs to "up it's game" to make it easier to hold it's own against the other NCEES approved calculators.

Since it competes directly with the TI-36x Pro and the Casio fx-991EX as NCEES test approved calculators, it really needs to have, AT LEAST, similar built-in capabilities. (And at least an on-board backup for pgms and eqs.)

As EngineerX pointed out, both of the others (the Casio in particular) have extensive built in solvers. The 35s has a 2x2 and a 3x3 linear solver, and an explicit integral solver. Whee. And although it can do Dot products, it can't do Cross products? (And let's just not compare speed to the 991EX.)

So yes, it's sadly lacking in built-in exam features.
And, as already pointed out, any programs you write....and equations you store....have to be entered manually, and can't be backed up.

The reason I use it, and recommend it (with the right additional software) for the NCEES exams, is the strength of the Equation Solver and (of course) the ease at which RPN allows quick/accurate calculations.

A new calculator that addresses the shortcomings would be very welcomed.