ccl: ccl (Clozure Common Lisp) ccl: ccl: Clozure CL (often called CCL for short) is a free Common Lisp ccl: implementation with a long history. Some distinguishing features of ccl: the implementation include fast compilation speed, native threads, a ccl: precise, generational, compacting garbage collector, and a convenient ccl: foreign-function interface. ccl: ccl: For additional information : ccl: http://ccl.clozure.com ccl: