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Retro Forth

Retro is a modern, pragmatic Forth drawing influences from many sources. It's clean, elegant, tiny, easy to grasp, and adaptable to many tasks.

It's not a traditional Forth. Drawing influence from colorForth, it uses prefixes to guide the compiler. From Joy and Factor, it uses quotations (anonymous, nestable functions) and combinators (functions that operate on functions) for much of the stack and flow control. It also adds vocabularies for working with strings, arrays, and other data types.

Retro runs on Nga, a tiny virtual machine emulating a MISC style processor. Implementations of this are included in 65c816 Assembly, C, C++, C#, JavaScript, Nim, Pascal, Python, Swift, and Retro.