Even as a keyboard operated calculator, the HP-65 can perform all trig functions in three angle modes, handle logarithms, and permit register arithmetic. Simply select the right pre-recorded program card, and start the program.ģ. With pre-recorded program cards from Hewlett-Packard, the HP 65 can be used by anyone to solve complex problems in such fields as electrical engineering, statistics, mathematics, medicine, finance, marine navigation, surveying and aviation. You can also edit any program and save it on a magnetic card for future use.Ģ. As a user-programmed calculator, the HP-65 lets you program up to five functions callable from the keyboard or by other programmed functions conditional skips based on logic comparisons and branches. These capabilities allowed the HP-65 to be used three ways:ġ. There were two program flags and four comparison tests for program branching. It ran programs that had as many as 100 steps. It had 51 built-in mathematical functions and data manipulation operations, a four register operational stack, nine addressable data registers, and five user-definable keys. Now they are not cheap but for those of us who love and us RPN based calculators, it is a bargain.Just 18 months after the first pocket calculator, HP introduced the HP 65 that was programmable with a magnetic card reader/writer.Īlthough the HP-65 was designed to operate in a logical, easy-to-learn way, it was capable of sophisticated computations. I found a company making clones of HP Calculators. Below is a link to the web page where there are information and links to download programs and a link to the HP Calculator Museum! Yep gather the kiddos and explore the museum. Did you know there was an online HP Calculator Museum? On a Iphone (which I have) under apps do a search for “Free42”. I found a free IOS and Android based HP 42S program that is really cool. I have two physical HP calculators right now and would have more but employee (one of my sons who we will call William) followed my instructions and sold them on Ebay! Now I regret letting them go but I digress. It was the HP 41 that set the stage for the surveying data collector revolution and it was HP that birthday the Silicon Valley revolution. I know from my travels that there are many of you that love the highly venerated Hewlett Packard scientific and programmable calculators.

Survey programs for hp calculators