User's Manual

121
these things.
Toprotectyourrights,weneedtomakerestrictionsthatforbid
anyone to deny you these rights or to ask you to surrender the
rights.Theserestrictionstranslatetocertainresponsibilitiesforyou
ifyoudistributecopiesofthesoftware,orifyoumodifyit.
Forexample,ifyoudistributecopiesofsuchaprogram,whether
gratisorforafee,youmustgivetherecipientsalltherightsthat
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know
their rights.
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