\defgroup Geometry Geometry
\brief The Geometry related packages
\defgroup Geometry_classes Geometry classes
\ingroup Geometry
\brief The Geometry related classes

 Several documents describing these classes are listed below:

  - The main geometry class is documented in class TGeoManager.
  - [Presentation/article at CHEP'03](http://www.slac.stanford.edu/econf/C0303241/proc/papers/THMT001.PDF)
  - [Presentation at ROOT 2004](http://www.slac.stanford.edu/BFROOT/www/Computing/Distributed/ROOT2004/files/gheata.ppt)
  - [Presentation at ROOT 2005](http://indico.cern.ch/getFile.py/access?contribId=s1t14&sessionId=1&resId=1&materialId=0&confId=a055638)
  - [Presentation at ROOT 2007](http://indico.cern.ch/materialDisplay.py?contribId=35&materialId=slides&confId=13356)

See also [the use of the geometry classes in AliROOT package of ALICE](https://alice-offline.web.cern.ch/AliRoot/Manual.html).

