User's Manual

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9. TheFreeSoftwareFoundationmaypublishrevisedand/
ornewversionsoftheGeneralPublicLicensefromtimeto
time. Such new versions will be similar in spirit to the present
version, but may dier in detail to address new problems or
concerns.
 Eachversionisgivenadistinguishingversionnumber.Ifthe
ProgramspeciesaversionnumberofthisLicensewhich
appliestoitand“anylaterversion”,youhavetheoptionof
followingthetermsandconditionseitherofthatversionorof
anylaterversionpublishedbytheFreeSoftwareFoundation.
IftheProgramdoesnotspecifyaversionnumberofthis
License, you may choose any version ever published by the
FreeSoftwareFoundation.
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.