User's Manual

144
Whenwespeakoffreesoftware,wearereferringtofreedom,notprice.
OurGeneralPublicLicensesaredesignedtomakesurethatyouhave
thefreedomtodistributecopiesoffreesoftware(andchargeforthis
serviceifyouwish),thatyoureceivesourcecodeorcangetitifyou
wantit,thatyoucanchangethesoftwareorusepiecesofitinnew
freeprograms;andthatyouknowyoucando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) offer 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.