## Do HP calculators still use RPN?

The HP RPN calculator has largely gone out of fashion it seems. Only a few models remain on the market and several are financial calculators. The HP-12C financial calculator is a wholly inadequate substitute for a scientific calculator.

### What happened to HP calculators?

While HP calculators are still being sold after the death of HP’s calculator division, they are no longer designed in-house but instead come from an outsourced OEM/ODM. This web page remains online for historical reasons, but HP as a brand of calculators has not died and will not disappear anytime soon.

#### Are HP calculators still made?

Today’s students are more likely to have a TI or Casio calculator, but HP is still in there with the HP Prime.

**How do I reset my HP 20s calculator?**

Resetting the calculator using the keyboard Press and hold the [C] key. Press and hold the third key from the left on the top row. Release both keys at the same time.

**Do any calculators use RPN?**

During the 1970s and 1980s, Hewlett-Packard used RPN in all of their desktop and hand-held calculators, and has continued to use it in some models into the 2020s. In computer science, reverse Polish notation is used in stack-oriented programming languages such as Forth, STOIC, PostScript, RPL and Joy.

## Are old HP calculators worth anything?

Most vintage pockets electronic calculators are a dime a dozen, with few exceptions (an original 1975 HP-25 programmable calculator in great condition might be worth about $100 or so).

### What is an RPN calculator?

While calculators emulating classical models continue to support classical reverse Polish notation, new reverse Polish notation models feature a variant of reverse Polish notation, where the ↵ Enter key behaves as in RPL. This latter variant is sometimes known as entry RPN.

#### Is HP Prime RPN?

The HP Prime’s non-CAS home-screen supports textbook, algebraic and 128-level RPN (aka Advanced RPN) entry logic.

**Who makes RPN calculators?**

cirbaf. DickCappels said: I recently trashed my HP-35S because of a very flaky keyboard. From looking around the internet it seems that the only Reverse Polish Notation (RPN) calculator still being manufactured is the HP-12 financial calculator.

**Does HP prime use RPN?**

## What should I do with my old calculator?

Calculators can go in the trash. Consider donating functioning calculators! Find a donation location.

### Is there a market for old calculators?

Mechanical calculators, and a few electronic calculators, can turn up at antiques and collectors fairs, though prices are generally higher and bargains are fewer. The market for old calculators has been revolutionised in the last few years with the founding of the eBay internet auction site.