Implementation-Defined Packages

“CLOS”

EXPORTs all CLOS-specific symbols, including some additional symbols.

“SYSTEM”

has the nickname “SYS”, and has no EXPORTed symbols. It defines many system internals.

“EXT”

is the umbrella package for all extensions: it imports and EXT:RE-EXPORTs all the external symbols in all CLISP extensions, so a simple (USE-PACKAGE "EXT") is enough to make all the extensions available in the current package. This package uses packages (in addition to “COMMON-LISP”): “POSIX”, “SOCKET”, “GSTREAM”, “GRAY”, “I18N”, “CUSTOM”.

“CHARSET”

defines and EXPORTs some character sets, for use with EXT:MAKE-ENCODING and as :EXTERNAL-FORMAT argument.

“FFI”

implements the foreign function interface. Some platforms only.

“SCREEN”

defines an API for random screen access. Some platforms only.

“CS-COMMON-LISP”
“CS-COMMON-LISP-USER”

:CASE-SENSITIVE versions of “COMMON-LISP” and “COMMON-LISP-USER”. See Section 11.5, “Package Case-Sensitivity”.