LXVII Help

LXVII User's Guide

Thank you for downloading LXVII, a calculator without equal.

LXVII (pronounced "67") is a programmable calculator for Mac OS X that is based on the classic Hewlett-Packard HP-67 calculator. “Programmable” means you can tell the calculator to remember and repeat a calculation any number of times.

It is also a document based calculator, which means you can save the state of the program when you exit. And, like all document based programs on the Mac, you can load multiple documents, that is, copiues of LXVII, at once.

If you are totally unfamiliar with the early Hewlett-Packard calculators and their Reverse Polish Notation (RPN) please refer to the user manual at hpcalc.org. The manual is over 500 pages, and while we don't expect you to read it from cover to cover, we do expect some familiarity with it and will refer to it in these help pages. Our short introduction to capabilities of the HP-67 is meant to show the differences between the HP-67 and LXVII. Being familiar with the HP-67 will help you get the most out of LXVII.

To summarize: For help with the HP-67, see the manual. For help specific to LXVII, and how it differs from the HP-67, please see these help topics:

- What’s New - Release Notes for this version

- Intro to LXVII - LXVII similarities and differences from the HP-67

- Keybindings - Keyboard shortcuts so you don’t need to use the mouse

- Using User-defined Keys - Adapting LXVII to your specific problem.

- Documents and Card Files - An introduction to the different file types used by LXVII.

- Using the Paper Tape - A feature adapted from the HP-67’s big brother, the HP-97

- Printing a program

- Contact Us

Thank you again for trying LXVII. We hope you find it useful.