I like the construction of these calculators, but I'm not a huge fan of the programming language. I think the Casio FX-4000P / RS EC-4020 was the pinnacle, but

I like the construction of these calculators, but I'm not a huge fan of the programming language. I think the Casio FX-4000P / RS EC-4020 was the pinnacle, but this was a few years later (and admittedly, not as numerically good as the HP). Editing was far easier with the dot-matrix display. Compare the programs: http://www.rskey.org/CMS/8-programmable-calculators/299-fx4000p http://www.rskey.org/CMS/8-programmable-calculators/299-fx40... http://www.rskey.org/hp15c http://www.rskey.org/hp15c Casio improved the fx4000p, but I think the design was not as coherent: http://www.rskey.org/fx4500p http://www.rskey.org/fx4500p