LICENSE

this is free and unencumbered software released into the public domain.

notwithstanding, some pieces from builtins began with several others:

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MIT License:

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom
the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.

"nanomsg" is a trademark of Martin Sustrik

full contributors list: https://github.com/nanomsg/nanomsg/blob/master/AUTHORS

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Copyright io.js contributors. All rights reserved. (The MIT License)

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Copyright Joyent, Inc. and other Node contributors. (The MIT License)

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Copyright (c) 2014, Nick Desaulniers, Tim Cameron Ryan. All rights reserved.
(The MIT License)

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Copyright (c) 2012 Nathan Rajlich <nathan@tootallnate.net> (The MIT License)

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Copyright (c) 2011 - 2014 David Björklund & contributors (The MIT License)

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Copyright (c) 2015 NAN contributors (The MIT License)

NAN contributors listed at https://github.com/rvagg/nan#contributors