Operation Manual
70 
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 modified 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 
reflect 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 effect 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 modification follow. 
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 










