These notes discuss the CLISP implementation of Common Lisp by Bruno Haible and Michael Stoll. The current maintainers are Bruno Haible and Sam Steingold.

This implementation is mostly conforming to the [ANSI CL] available on-line as the [CLHS] (but the printed ANSI document remains the authoritative source of information). [ANSI CL] supersedes the earlier specifications [CLtL1] and [CLtL2].

The first part of these notes, Part I, “Chapters or the Common Lisp HyperSpec”, is indexed in parallel to the [CLHS] and documents how CLISP implements the standard [ANSI CL].

The second part, Part II, “Extensions”, documents the CLISP extensions, i.e., the functionality that goes beyond the [ANSI CL] requirements. It includes widely portable common extensions, e.g., Section 29.1, “Meta-Object Protocol”, as well as CLISP-specific extensions, e.g., Section 31.5, “Socket Streams”.

The third part, Part III, “Internals of the CLISP Implementation”, is intended mostly for developers as it documents the CLISP internals, e.g., garbage-collection, adding new built-ins, and the bytecodes generated by the compiler (i.e., what is printed by DISASSEMBLE).