144
Also add informat ion on how to contact you by e lectronic and pap er mail.
If the program is i nteractive, m ake it output a shor t notice like this wh en it start s in an interacti ve mode:
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:$55$17<IRUGHW DLOVW\SHCVKRZZ·7K LVLVIUHHVRIWZ DUHDQG\RXDUHZHO FRPHWRUHGLVWU LEXWHLWXQGHU
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/LFHQVH2IFRXU VHWKHFRPPDQGV\RXX VHPD\EHFDOOHGVRPHW KLQJRWKHUWKDQCVK RZZ·DQGCVKRZF·WKH\
could even be mouse-clicks or menu items--whatever suits your program.
<RXVKRXOGDOVRJHW\RXUHPS OR\HULI\RXZRUNDVDSU RJUDPPHURU\RX UVFKRROLIDQ\WRVLJQD´FRS\ ULJKW
GLVFODLPHUµIRUW KHSURJUDPLIQH FHVVDU\+HUHLVDV DPSOHDOWHUWK HQDPHV
Yoyodyne, Inc., here by disclaims all copyr ight interest in t he program
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<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General P ublic License does not p ermit incorpor ating your progr am into propriet ary programs . If your
program is a subr outine librar y, you may consider it mor e useful to permit li nking propriet ary applicat ions with
the library. If t his is what you want to do, us e the GNU Librar y General Publ ic License instead of t his License.
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In addition to the p ermissions in the G NU General Pub lic License, the Fre e Software Fou ndation gives you
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DQRWKHUSURJU DP
GNU LIBRA RY GENERAL PUB LIC LICENSE
Version 2, June 1991
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Everyone is per mitted to copy and dis tribute verb atim copies of this licen se document, but cha nging it is not
allowed.
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ordinary GPL.]
Preamble
The licenses for most software are designed to take away your freedom to share and change it. By contrast, the
GNU General Public Licenses are intended to guarantee your freedom to share and change free software--to make
sure the softw are is free for all i ts users.
This license, the L ibrary Gene ral Public License , applies to some spec ially designated Fr ee Software Fou ndation
software, a nd to any other libra ries whose autho rs decide to use it. You can u se it for your librar ies, too.
When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are
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