Python
Python documentation (python3) : https://docs.python.org/3/
Julia
Julia Documentation : https://docs.julialang.org/en/v1/
HTML
HTML MDN Web Docs : https://developer.mozilla.org/ja/docs/Web/HTML
CSS
CSS MDN Web Docs : https://developer.mozilla.org/ja/docs/Web/CSS
JavaScript
JavaScript MDN Web Docs : https://developer.mozilla.org/ja/docs/Web/JavaScript
TypeScript
TypeScript Documentation : https://www.typescriptlang.org/docs/
Rust
The Rust Programming Language : https://doc.rust-lang.org/stable/book/