Mitch's LISP Mathematical Library
This system contains various bits of mathematically oriented code.
You can learn more about this library on the project web page:
http://www.mitchr.me/SS/mjrcalc/
A good starting point for more detailed information is the documentation string on the function MJR_META_HELP found in the file lib-meta.lisp.
In general, the place to start with a package called "PKG", is the documentation string for the function named MJR_PKG_HELP which will be located in a file named ???-PKG.lisp.
The license for this software may be found in the LICENSE.TXT file.
Have fun.