Check out our review of the HP 35s scientific calculator to find out the specs, pros, cons, and more. Scientific projects require accuracy, functionality and dependability for success. Engineering; Surveying; Science; Medicine; ... Save on Scientific Calculators with Free Shipping when you buy now online. Scientific projects require accuracy, functionality and dependability for success. I paid for it, but i can't use it. HP 35s Scientific Calculator (155) F2215AA#ABA. Scientific projects require accuracy, functionality and dependability for success. I got it online and as a CD. General Info about the HP 35s Scientific Calculator. The HP 35s scientific programmable calculator delivers them—and more—with features that include 30KB user memory, your choice of RPN and algebraic entry-system logic, a convenient two-line display, and the time-saving HP … Get our best deals on Calculators when you shop with HP. I bought an HP 35s emulator back in March. The reiteration of the classic HP 35s scientific calculator has been a big hit. The HP 35s scientific programmable calculator delivers them—and more—with features that include 30KB user memory, your choice of RPN and algebraic entry-system logic, a convenient two-line display, and the time-saving HP … Several attempts to contact HP about this have failed: no reply. HP Store. Most users tend to be major fans of the Reverse Polish Notation (RPN) mode, which this calculator … Neither came with the activation code, the serial number, or whatever. The HP 35s scientific programmable calculator delivers them—and more—with features that include 30KB user memory, your choice of RPN and algebraic entry-system logic, a convenient two-line display, and the time-saving HP … HP … Anyone know how to get to a real person at HP …