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which runs on most major Unix platforms. It mainly conforms to the
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[ANSI Common Lisp standard](http://www.lispworks.com/documentation/HyperSpec/Front/index.htm). Here is a summary of its main features:
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* support for `static arrays` that are never moved by GC but are
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properly removed when no longer referenced.
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* `Unicode` support, including many of the most common external
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formats such as UTF-8 and support for handling Unix, DOS, and
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Mac end-of-line schemes.
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* native `double-double floats` including complex double-double
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floats and specialized arrays for double-double floats and and
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complex double-double floats that give approximately 106 bits
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(32 digits) of precision.
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* a `sophisticated native-code compiler` which is capable of
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powerful type inferences, and generates code competitive in
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speed with C compilers.
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* `generational garbage collection` on all supported
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architectures.
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* `multiprocessing capability` on the x86 ports.
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* a foreign function interface which allows interfacing with C
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code and system libraries, including shared libraries on most
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platforms, and direct access to Unix system calls.
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* support for interprocess communication and remote procedure calls.
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* an implementation of CLOS, the [Common Lisp Object System](http://en.wikipedia.org/wiki/Common_Lisp_Object_System), which
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includes multimethods and a metaobject protocol.
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* a graphical source-level debugger using a Motif interface, and a
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code profiler.
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* an interface to the X11 Window System (CLX), and a sophisticated
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graphical widget library ([Garnet](https://www.cs.cmu.edu/~garnet/)).
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* programmer-extensible input and output streams
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([Gray Streams](http://www.nhplace.com/kent/CL/Issues/stream-definition-by-user.html) and
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[simple-streams](http://www.franz.com/support/documentation/current/doc/streams.htm)).
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* an Emacs-like editor, [Hemlock](http://cmucl.org/hemlock/index.html), implemented in Common Lisp.
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* `freely redistributable`: free, with full source code (most of
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which is in the public domain) and no strings attached (and no
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warranty). Like the GNU/Linux and *BSD operating systems, CMUCL
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is maintained and improved by a team of volunteers collaborating
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over the Internet.
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## Latest News
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