HP-11c vs. HP-34c - differences between them - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- Thread: HP-11c vs. HP-34c - differences between them (/thread-15347.html) HP-11c vs. HP-34c - differences between them - Gene - 07-15-2020 12:56 AM Started looking at these two (when I stumbled on an 11c picture) because of their similarity. Thought I'd start a list of differences in one place. I'm sure I'll miss some things. The 11c has these features that the 34c does not: LCD Display Unified <- key (clear digits, clear X if not entering digits, delete program step) Permutations Combinations Random number generator 3 more user defined keys (C, D and E) Hyperbolic trig functions and inverses Self test includes keyboard test The 34c has these features that the 11c does not: LED Display SOLVE Integrate DSP I function MANT function CLX key DEL function 7 more program steps all other being equal (210 vs. 203) 2 more flags (2-3) 2 more subroutine levels (6 total) Note: this list is updated from subsequent posts below and will be updated as any additional items are pointed out. RE: HP-11c vs. HP-34c - differences between them - Gerson W. Barbosa - 07-15-2020 02:29 AM Solve and Integrate makes the HP-34C more similar to the HP-15C, I think. The HP-15C was my first HP calculator and these, together with complex numbers, were very useful to me, but I would be pleased with the HP-34C. Mine is the soldered version, too bad itâ€™s disassembled. https://www.hpmuseum.org/cgi-bin/compare.cgi?calc1=HP-11C&calc2=HP-34C&calc3=HP-15C&calc4=none&calc5=none&calc6=none&calc7=none&calc8=none&shade=ON&diff=ON RE: HP-11c vs. HP-34c - differences between them - Paul Dale - 07-15-2020 04:51 AM The 11C has a random number generator, which is where the missing program/register went. The 11C also has great battery life. Pauli RE: HP-11c vs. HP-34c - differences between them - Didier Lachieze - 07-15-2020 05:47 AM The first obvious (too obvious ?) difference is the display: LED for the 34C and LCD for the 11C which has in addition annunciators. Then you have the softkeys: 2 primary keys for the 34C, 5 for the 11C combined with USER mode. The number of subroutine levels is also different: 6 for the 34C and 4 for the 11C. The 34C has DSP I and MANT. The 34C has a CLx and a DEL key, while the 11C has a single <- key with digit deletion during number entry. The self tests of the 11C include a keyboard test. Note: in the HP Museum comparison table there is a mistake, the 11C has also line number addressing, same as the 34C.