CASIO fx-4000P scientific calculator from 1986

[Csaba Tizedes]

(09-26-2018 04:54 PM)Dave Britten Wrote:  most Casios are really cheap compared to just about any HP.

As I can see the pricing of CASIOs on ebay this is not true. The valuable CASIOs price is typically higher than the HPs.

(09-26-2018 04:54 PM)Dave Britten Wrote:  Also, the array-style memory addressing of their older models (up through what Wikipedia calls the 1st generation of graphing models) makes it super easy to create a MISO-style solver using the secant method.

Actually this is true

Csaba