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...Class Libraries: • RPN Engine: Full-featured calculation engine for Pascal-based RPN calculators • Segmitator: Library for virtual seven-segment displays Applications: • TRURL A: Simple demo app for the RPN Engine • TRURL B: RPN calculator in the design of the famous calculators by Dieter Rahms for Braun • TRURL G: Desktop RPN calculator inspired by the UI of the DSKY unit of the Apollo Guidance Computer (AGC)

Integer and fractional elements are allowed, but not floating point numbers. Matrices (or their elements) and systems of linear equations can be also generated by the app, to practice with operations and propieties. The app calculates the matrix range, determiner of square matrices, traspose, inverse of inversible matrices (that is, square matrices with non zero determiner), the matrix of adjuncts, the forms of Gauss and Gauss-Jordan. It allows submatrices extraction by selection of rows and columns. ...

This app allows build by introducing chemical compunds or import from a database equations of chemical reactions and balance them. Also it makes stoichiometric calculations with the balanced equation Do stoichiometric calculations on the balanced equation. Results can be saved in a text file. Also, there is an editable database of chemical elements.

This app sets and gets the plane height and slope. You can see, store, load and plot plane test results to observe the rolling/sliding phenomen.