licenses
Copyright 2026 Harriett Little.
The text of this site, including the papers, is licensed under the Creative Commons Attribution 4.0 International license (CC BY 4.0). You may copy, quote, translate and build on it for any purpose, including commercially, as long as you credit Harriett Little, link to the license and say if you changed anything. The legal code is at Creative Commons.
The programs, their emitted C, and the site's own scripts and styles are licensed under the Apache License 2.0 with LLVM Exceptions. The exceptions let a compiled program that embeds this code be redistributed without the license's notice requirements for the embedded part, and address combining it with software under the GPLv2. The text is the same as the LLVM project's.
third-party components
Each is used under its own terms, reproduced here in full.
- Pyodide 0.26.4 (
pyodide/), Mozilla Public License 2.0: text - CPython 3.12 standard library (
pyodide/python_stdlib.wasm), PSF License: text - CaskaydiaCove Nerd Font Mono 3.5.1 (
fonts/), Cascadia Code copyright Microsoft Corporation, SIL Open Font License 1.1, patched with Nerd Fonts glyphs; subset to two woff2 files with fontTools: text
what this site does with your browser
Programs run inside your browser, in a Python runtime compiled to WebAssembly. Nothing you type is sent anywhere. The site sets no cookies and runs no analytics. It keeps one value in your browser's local storage, the name of the program you last opened on the home page, so that it opens there next time; clearing site data removes it. The site is served through Cloudflare, whose privacy policy covers the request logs at its edge.
trademarks and affiliations
Trick and TrickHLA are NASA software. SpaceFOM is a SISO standard. Pitch pRTI is a product of Pitch Technologies. Cascadia Code is a Microsoft typeface. They are named to identify what was used or cited. None of their owners is affiliated with this site or has reviewed it.