TrurlTeam

@teamtrurl.bsky.social

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TRURL is a suite of #RPN (reverse Polish notation) calculators written in Object Pascal, and it includes a free and open RPN engine for your own #Pascal programs. http://trurl.sf.net

"All Hewlett-Packard pocket calculators feature RPN logic- the most sensible logic system a pocket calculator can have!"

Illustration of HP's four-level stack system.

MINUTEMAN * 6X, an RPN calculator introduced by Commodore in 1974.

Screenshot of TRURL B on macOS Ventura 13.7.8

Screenshot of the Lazarus IDE with TRURL's RPN engine and a test app using this library and FPCUnit.

Screenshot for a test app of Segmitator 1.2. It shows how the input number 4.2E-6 is displayed (as 42E-7) in both text mode and as a graphic representation.

Screenshot of the source code of TRURL's segmitator 1.1.0 with a demo app

Screenshot of the source code of TRURL's RPN Engine 1.1.0

Screenshot of TRURL G 1.2.1 on macOS 13.7

Screenshot of TRURL G 1.2 on macOS 13.7.4 Ventura

Screenshot of a test app for segmitator. It shows two virtual seven-segment displays implemented with different techniques (ASCII and graphics)