About this calculator
This RPN calculator is built with a static site (Vite + Vanilla JS) using client-side logic in /src/app.js, and styles in /src/styles.css.
The majority of the code was written by JUNIE AI (an autonomous programmer by JetBrains), with iterative guidance and requirements provided by the project owner.
Source code: github.com/pjcunningham/rpn.calc
Skins
This app includes multiple visual skins you can pick from the top-right Skin menu:
- Green (classic CRT)
- Amber (1980s amber phosphor)
- Windows 3.1 (light gray, navy accents)
- Apple (Modern) — light, clean, blue accents
- Commodore 64 (blue background, light blue text)
- BSOD (blue screen, white text)
- USSR NIXIE (1970s Nixie tube orange glow)
- Sinclair LED (early Sinclair Cambridge LED)
- HP-48SX LCD (dot-matrix green/gray LCD)
- Sonnet 18 (Shakespeare parchment & ink)