# Common Lisp
Common Lisp is a [Lisp](lisp.md) dialect, created as a successor of MIT's Maclisp.

It also one of the most efficient (in terms of execution speed) Lisps, almost archiving the
performance of an equivalent [C](c.md) program when using a compiler and type hints.

Unlike other Lisps, Common Lisp is gradually typed: by default its type system is dynamic,
but it allows to specify the explicit type for a binding, which then a compiler can use
for compile-time type checking and for producing better [machine code](machine_code.md).

It also allows for [OOP](oop.md) with the included CLOS (Common Lisp Object System).

Notably Common Lisp also has an interactive environment, SLIME (The Superior Lisp Interaction Mode for [Emacs](emacs.md)) which
allows REPL-driven development and live program debugging. Unfortunately, it seems to be almost vendor-locked into Emacs.

## Implementations
- [SBCL](https://www.sbcl.org/) (Steel Bank Common Lisp): a [JIT](jit.md) compiler, seems
to be the most popular implementation; public domain.
- [CLISP](https://www.gnu.org/software/clisp/): bytecode interpreter, last release was in 2010 but
it is still in active development.
- [GCL](https://www.gnu.org/software/gcl/) (GNU Common Lisp): GNU's Common Lisp compiler, based in Kyoto Common Lisp (KCL).
- [ECL](https://ecl.common-lisp.dev/) (Embeddable Common Lisp): compiler, also derived from KCL.
- [CCL](https://ccl.clozure.com/) (Closure Common Lisp).
- KCL (Kyoto Common Lisp): Historical, one of the first compilers made. Made in Kyoto, Japan--hence the name.
- LispWorks: propietary, includes an [IDE](ide.md).
- ...

## Examples
```lisp
(princ "Hello, World!")
```
TODO

## Resources
- Common Lisp HyperSpec: HTML rendition of the Common Lisp ANSI standard, can be
found here: <https://www.lispworks.com/documentation/HyperSpec/Front/> with some
better looking versions here: <https://novaspec.org/cl/> and <https://cl-community-spec.github.io/pages/index.html>.
- [CLiki](https://www.cliki.net/): a Common Lisp Wiki.
- <https://lisp-lang.org/>: kind of semi-official webpage for Common Lisp.
- [The Common Lisp Cookbook](https://lispcookbook.github.io/cl-cookbook/)

## See also
- [Scheme](scheme.md)