[wyclif]

While I am definitely fond of the HP-35 in a nostalgic sense, my real-life working calculator was the HP-48GX when I became a land surveyor. I added a COGO card that would calculate pavement design, storm water pipe modelling, and the area of a polygon after the coordinates of each point were given. And away I went. There wasn't much I couldn't do with that, graphing or calc-wise. Made my job so much easier in the field.

When they killed the HP-48GX, and replaced it with inferior models, it was a dark day in land surveying.

[jwr]

The HP-48G/GX was also my calculator of choice and I really disliked the later HP49. However, I then tried the HP50G, and was instantly hooked. Once you get over the differences in key layout, it's like a HP-48GX loaded with tons of useful software, in a slightly better form factor. I now have a HP50G and a HP-48G, but I never use the older model.

On iOS, I use the Emu50G app, which works, but could really use some improvements and optimizations. It's a fork of emu48.

Incidentally, I think the HP-50G is the last good engineering calculator. I'm puzzled as to how people get around without one these days: don't tell me about python, scipy and other similar shells: there is nothing else out there that can do so much, so efficiently.

[vq]

Have you tried Calc? It's loosely modelled after the HP-calculators and it's my first choice of calculator when I have a full blown computer at my hands.

https://www.gnu.org/software/emacs/manual/html_mono/calc.htm...

[FractalLP]

Voyage-200 on the TI side was great. A TI-89 with more RAM and horizontal full qwerty keyboard. A monster size wise, but I loved that thing.