It contains Lisp code for various applications which is: Common Lisp i.e. runs in ANSI Common Lisp implementations Free Software according to the Debian Free Software Guidelines (e.g. licensed under GPL, LGPL, MIT or BSD licenses, or public domain) Portable i.e. should be portable among CL implementations with low effort, and does not require modifications to the CL implementation itself Self-contained i.e., does not require packages not in this repository Ready to use i.e., runs out of the box in the Free CL implementations.