Free software and Software in Public Domain
Free
software is different from software in public domain. The first, when
used in combination with typical (as the licenses GPL and BSD) licenses,
it guarantees the authorship of the desenvolvedor or organization. The
second case happens when the years pass foreseen in the laws of each
country of protection of the author's rights and east becomes very
common. Nevertheless, a software in public domain can be considered as a
free software.
Free software and Copyleft
Licenses
as GPL contain an additional concept, known like Copyleft, that bases
on the propagation of the rights. A free software without copyleft can
be turned no-free for an user, case wants like this him/it. Already a
free software protected by a license that offers copyleft, if
distributed, it should be under the same license, in other words,
reviewing the rights.
Associating the copyleft concepts and free
software, programs and derived services of a free code obligatorily
should stay with a free (the details of which you program, which
services and which licenses are defined for the original license of the
program) license. The user, however, it stays with the possibility of
not to distribute the program and to maintain the modifications or
services used for itself own.
Sale of Free Software
The licenses of free software allow them to be sold, but these in his/her great majority are available gratuitously.
Once
the buyer of the free software is entitled to the four striped
freedoms, he could redistribute this software gratuitously or for a
smaller price than that that paid.
As example could mention Red
Hat Enterprise Linux that is marketed by Red Hat, starting from him,
several clones were created as CentOS that can be lowered gratuitously.
A
lot of companies opt to distribute the same product on two or more
licenses, usually one on a license copyleft and free like GPL and
another on a license landlady and he/she pays. Another very common
difference is that the versions pay usually accompany some type of
additional service, as right to it supports technician, for instance.
Was this Helpful ?
Author: Luis Miguel - About the Author:
Luis miguel love software especially the POS Software system. Visit this at POS Software system and see the Pos Software 
No comments:
Post a Comment