I do not want to repeat the negative reviews some reviewers regarding the display and accuracy at this point, but should these peculiarities, as I like to call it, also give this computer. The display problem (Exponent does not fit into the visible region of the line) had me so far not aware of because I always work with the setting FIX 4 (default on some old HP calculators).
Emphasized the Equation mode (EQN), and the solver are (SOLVE), which - like all other functions - can be efficiently integrated into routines.
Matrix is not supported, however, vector arithmetic is with 2D and 3D vectors possible.
Is strange that the (square) root of a negative number can not be calculated directly, but only through the detour [EQN] (-REGY + 0i) ^ (1 / REGX) [ENTER] or Y [i] [0] [ENTER] X [1 / x] [y ^ x].
Getting used to, perhaps, is that many functions can be found in behind multiple assignments of keys hidden menus.
The pity is that the CHS and EEX keys have been replaced by +/- and E at the new HP models.
The German version of the manual is very poorly translated.
I have some little helpers such as the calculation of fuel consumption, electricity cost calculation, KGV / GGT, battery charging time estimation, body mass index, physical work (estimate calories burned climbing stairs ;-), and much more. deposited.
The focus of this unit is on 'non-graphics capable programmable calculator', so the absence of external interfaces that bothers me, inter alia, not for data storage. The theoretically 26x999 and / or available up to 9999 without label program lines can not be the HP 35s practically maxed because such programs, how they are coded here of a certain size and are no longer reasonable to handle.
My collection program for the 35s I manage with the help of a spreadsheet.
From time to time as a pastime I try certain tasks with the least possible program storage and register consumption and / or non-destruction of the stack contents to solve; This is interesting, since the computer mixed programming using RPN (not to be confused with RPL, such as. the HP-28S), algebraic input, and allows storage and stack arithmetic or direct addressing of stack registers. In addition, indirect addressing is supported and recursion is limited.
Meanwhile, the HP 35s is since its appearance somewhat fallen in price. So, if someone is interested apart from mobile phones and smartphones for alternative input and operating concepts, I can thoroughly recommend this computer. Also motivated this HP again, together with the archives on the Internet, a home for those interested in the history of the development of (programmable) TR since the 1960s.
