42 Trademark and License Information
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A more frequent case is that a free library does the same job as widely used non-free libraries. In this case, there is
little to gain by limiting the free library to free software only, so we use the Lesser General Public License.
In other cases, permission to use a particular library in non-free programs enables a greater number of people to use
a large body of free software. For example, permission to use the GNU C Library in non-free programs enables many
more people to use the whole GNU operating system, as well as its variant, the GNU/Linux operating system.
Although the Lesser General Public License is Less protective of the users’ freedom, it does ensure that the user of
a program that is linked with the Library has the freedom and the wherewithal to run that program using a modified
version of the Library.
The precise terms and conditions for copying, distribution and modification follow. Pay close attention to the differ-
ence between a “work based on the library” and a “work that uses the library”. The former contains code derived from
the library, whereas the latter must be combined with the library in order to run.
• This product includes software developed by Independent JPEG Group.
• This product includes software developed by the FreeType Project.
The FreeType Project is copyright (C) 1996-2000 by David Turner, Robert Wilhelm, and Werner Lemberg. All rights
reserved.