User's Manual

73
Weprotectyourrightswithtwosteps:(1)copyrightthesoftware,
and (2) oer you this license which gives you legal permission to
copy,distributeand/ormodifythesoftware.
Also,foreachauthor’sprotectionandours,wewanttomake
certainthateveryoneunderstandsthatthereisnowarrantyfor
thisfreesoftware.Ifthesoftwareismodiedbysomeoneelseand
passed on, we want its recipients to know that what they have is
not the original, so that any problems introduced by others will
not reect on the original authors’ reputations.
Finally,anyfreeprogramisthreatenedconstantlybysoftware
patents.Wewishtoavoidthedangerthatredistributorsofafree
program will individually obtain patent licenses, in eect making
the program proprietary. To prevent this, we have made it clear
thatanypatentmustbelicensedforeveryone’sfreeuseornot
licensed at all.
Theprecisetermsandconditionsforcopying,distributionand
modicationfollow.
Terms&conditionsforcopying,distribution,&modication
0. This License applies to any program or other work which
contains a notice placed by the copyright holder saying it may
bedistributedunderthetermsofthisGeneralPublicLicense.
The“Program”,below,referstoanysuchprogramorwork,and
a “work based on the Program” means either the Program or
any derivative work under copyright law: that is to say, a work
containingtheProgramoraportionofit,eitherverbatimor
with modications and/or translated into another language.
(Hereinafter,translationisincludedwithoutlimitationinthe
term “modication”.) Each licensee is addressed as “you”.
Activities other than copying, distribution and modication are
not covered by this License; they are outside its scope. The act