Takes an algebraic expression and converts it to an RPN string. The program itself may not be all that useful but it hopefully provides to those interested in programming expressions a bit of insight into how expressions are built.

A variety of functions for working with dates, including determining whether a date is valid, if a year is leap year, pulling out the century, year, month, day, and week number, Julian date conversions, and Easter date calculation.

A function CNV(X) to convert between units where X can be a real (18) or a unit (18_inch). Distance, Volume, and Weight have been implemented. Works under Home and CAS.

Allows you to enter numbers (0 to 255) for each R, G and B and displays the corresponding color over the screen. For example, Red=255, Green=255, Blue=0 will color your screen yellow.

Calculates the length of daylight for any day given the Earth's latitude of the observer (from -90° (South) to 90° (North)) and the number of days since the December solstice (around December 21-22). Note that is different from many approximate formulas which used the vernal equinox as a starting point.

Multi-function program simulating the 50g's date functions DDAYS and Date+ (HP Prime = DPLUS). In addition there are further functions like JDN, N2J, DOW, CALD, DOE. DFX functions are designed to be called from both the CAS and HOME environments, including the ability to choose them with softkeys.

Some routines that might help parse Fortran-formatted data. A work in progress that acts as a reminder of what popular formatting codes mean. Parsing these comprehensively will never be completed, but some of the simpler formats are handled.

Links Greek letters to their most logical calculator buttons to ease operation with them without having to rely on the touchscreen. Also ENTER = solve().

The functions contained in this program use the Spreadsheet application to provide an analog of the Data Frame object in the R language and environment for statistical computing and graphics. In particular, the functions provide a means of loading a spreadsheet from a CSV file and saving spreadsheet content to a CSV file. Additional table management functions are provided, for example to add or remove rows or columns. RTable uses the RFC standard for CSV files, but you can specify changes such as a different field delimiter character (e.g. tab) or fixed-column fields. You can choose which attribute of a cell to load or save, such as name or formula, but only values are loaded correctly in this release. A small number of frame related functions are provided, like names and ncol. Comprehensive PDF documentation included.

An improved alternate terminal program, eliminating the problems with the very size-limited line buffer and not displaying the most recent PRINTed line.

Prime's answer to mobile phone flashlights. Given that the HP Prime has no external accessible lights, this program may be of little practical use, unless the lights go out while you are using your calculator. The design aim is a compromise between maximizing the limited illumination available, and including some information that a flashlight would not (the time the light was activated).