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 - aggressive multi-threaded reduction of lambda calculus expressions
 - small memory footprint
 
+## Note
+
+This repository also contains an implementation of the RKNL abstract
+machine. You can find it in the `rknl` branch.
+
 ## Libraries
 
 - [hashmap.c](https://github.com/tidwall/hashmap.c) \[MIT\]: Simple but