CMS Software Distribution on the LCG and OSG Grids
  The efficient exploitation of worldwide distributed storage and computing resources available in the grids require a robust, transparent and fast deployment of experiment specific software. The approach followed by the CMS experiment at CERN in order to enable Monte-Carlo simulations, data analysis and software development in an international collaboration is presented. The current status and future improvement plans are described. 
K. Rabbertz (1), M. Thomas (2), S. Ashby (3), M. Corvo (3 and 4), S.   Argir\`o (3 and 5), N. Darmenov (3 and 6), R. Darwish...