User's Manual

129
copy, and you may at your option oer warranty protection in
exchangeforafee.
2. You may modify your copy or copies of the Program or any
portion of it, thus forming a work based on the Program, and
copyanddistributesuchmodicationsorworkunderthe
terms of Section 1 above, provided that you also meet all of
these conditions:
 a) Youmustcausethemodiedlestocarryprominent
noticesstatingthatyouchangedthelesandthedateofany
change.
b) You must cause any work that you distribute or publish,
that in whole or in part contains or is derived from the
Program or any part thereof, to be licensed as a whole at no
charge to all third parties under the terms of this License.
 c)Ifthemodiedprogramnormallyreadscommands
interactively when run, you must cause it, when started
running for such interactive use in the most ordinary way, to
print or display an announcement including an appropriate
copyright notice and a notice that there is no warranty (or
else, saying that you provide a warranty) and that users may
redistribute the program under these conditions, and telling
theuserhowtoviewacopyofthisLicense.(Exception:ifthe
Program itself is interactive but does not normally print such
an announcement, your work based on the Program is not
required to print an announcement.)
 Theserequirementsapplytothemodiedworkasawhole.
Ifidentiablesectionsofthatworkarenotderivedfromthe
Program, and can be reasonably considered independent and
separate works in themselves, then this License, and its terms,
do not apply to those sections when you distribute them as
separate works. But when you distribute the same sections
as part of a whole which is a work based on the Program, the