See 'language subsets' in the Common Lisp standard. http://www.lispworks.com/documentation/lw50/CLHS/Body/01_g.htm http://www.lispworks.com/documentation/lw50/

See 'language subsets' in the Common Lisp standard. http://www.lispworks.com/documentation/lw50/CLHS/Body/01_g.htm http://www.lispworks.com/documentation/lw50/CLHS/Body/01_g.h... Roughly: A language would be a subset of Common Lisp, when all programs in that language are valid standard Common Lisp programs.