OCaml is the most popular variant of the Caml language. From a language standpoint, it extends the core Caml language with a fully-fledged object-oriented layer, as well as a powerful module system, all connected by a sound, polymorphic type system featuring type inference. The OCaml system is an industrial-strength implementation of this language, featuring a high-performance native-code compiler (ocamlopt) for 9 processor architectures (IA32, PowerPC, AMD64, Alpha, Sparc, Mips, IA64, HPPA, StrongArm), as well as a bytecode compiler (ocamlc) and an interactive read-eval-print loop (ocaml) for quick development and portability. The OCaml distribution includes a comprehensive standard library, a replay debugger (ocamldebug), lexer (ocamllex) and parser (ocamlyacc) generators, a pre-processor pretty-printer (camlp4) and a documentation generator (ocamldoc)