The Python License is a deprecated computer software license created by the Corporation for National Research Initiatives (CNRI). It was used for versions 1.6 and 2.0 of the Python programming language, both released in the year 2000. The Python License is similar to the BSD License and, while it is a free software license, its wording means that it is incompatible with the GNU General Public License (GPL) used by a great deal of free software including the Linux kernel. For this reason CNRI retired the license in 2001 in favour of the Python Software Foundation License.