This calculator can do many things, and can be bought for about $60.
It can be programmed. It cannot link to a PC.
However, here are some notes, with a sample elementary program for the h-dial. Also, an EOT calculation (described in the notes) but using an EQUation as opposed to a program
The notes cover how to enter a program, and tips to avoid frustration.
My personal wish is that they revert to what was done 25 years ago, namely use BASIC and not the convoluted method of programming now used. The current method is comparable to BASIC but entering formula and so on is very convoluted, hence why I added these notes.
PERSONAL PREFERENCE
In spite of the HP35s, my personal preference is the Casio fx9860, in particular, the spreadsheet, and its cost.