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Additional recommended knowledge
The first version of GEANT dates back to 1974. Versions of GEANT through 3.21 were written in FORTRAN and eventually maintained as part of CERNLIB. Since about 2000, the last FORTRAN release has been essentially in stasis and receives only occasional bug fixes. GEANT3 is, however, still in use by some experiments. Most of GEANT3 is available  under the GNU General Public License, with the exception  of some hadronic interaction code contributed by the FLUKA collaboration.
The latest generation of the software is Geant4 (when referring to this version, the name is typically no longer capitalized). It is a complete rewrite in C++ with a modern object-oriented design. Geant4 was developed by the RD44 collaboration in 1994-1998 and is being maintained and improved now by the Geant4 collaboration. For quite some time Geant4 did not have a clearly defined software license. As of version 8.1 (released June 30, 2006) this omission has been remedied. Geant4 is now available under the Geant4 Software License.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "GEANT_(program)". A list of authors is available in Wikipedia.|