# Additional Tools

In addition to the core `retro` binary, the `bin` directory
will contain a few other tools.

## retro

This is the main RETRO binary.

## retro-describe

This is a program that looks up entries in the Glossary.

## retro-embedimage

This is a program which generates a C file with the ngaImage
contents. It's used when building `retro`.

## retro-extend

This is a program which compiles code into the ngaImage.
It's used when building `retro` and when you want to make a
standalone image with custom additions.

## retro-muri

This is the assembler for Nga. It's used to build the initial
RETRO kernel and can be used by other tools as well.

## retro-unu

This is the literate source extraction tool for RETRO. It
is used in building `retro`.