The functions can anyone himself up, in my opinion, has this computer everything I so need for the usual calculations, they have also been described here, I'm missing anything. As I said, I actually had me nostalgic reasons bought this computer since I never actually need a calculator in my profession, but in the meantime the HP35s for continuous computing companion in my pocket has become. In addition, you can once again deal with many mathematical and technical content, probability calculations, zeroing calculations, normal distribution, statistics, complex numbers, many fundamental constants, integration vectors, and the possibility of programming with a simple assembler-like notation, etc.
As previously most of the tasks were made procedural or symbolic or algbrarisch or without a calculator help, the calculator was in the exam actually not necessary since the derivation or the methodologies were indeed retrieved. But for the exercises and learning was such a calculator of course indispensable.
Of course, there are now these graphing calculators, the HP35s is "old school" with two alphanumeric rows, but for so incurred bills I do not need for graphical tasks as a computer, I also think that with the advent of CAS programs, eg " PocketCAS "I have to get myself also no such graphical computer (whether I would like it as a hobby is another question, for example, the HP Prime), since one graphical problems also very good, or better, can work on the tablet / iPad.
In this respect, this computer is a constant small computational tool that I can use for all kinds of daily calculations, when I need him time.