And some implementations in:
- C: https://nakkaya.com/2010/08/24/a-micro-manual-for-lisp-imple...
- Python: https://github.com/mario-goulart/not-the-whole-truth
- Javascript: https://kybernetikos.github.io/Javathcript/
- Swift: https://www.uraimo.com/2017/02/05/building-a-lisp-from-scrat...