User's Manual

126
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.