User's Manual

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10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are dierent, write to
the author to ask for permission.
For software which is copyrighted by the Free Software
Foundation, write to the Free Software Foundation; we
sometimesmakeexceptionsforthis.Ourdecisionwillbe
guided by the two goals of preserving the free status of all
derivatives of our free software and of promoting the sharing
and reuse of software generally.