The purpose of HAL Theses is to facilitate the self archiving of thesis manuscripts, which are important documents for direct scientific communication between scientists. HAL Theses is actually a particular "environment" of HAL. It therefore has the same objective: make scientific documents available to scientists all around the world, rapidly and freely, but with a restriction to PHD thesis and habilitations (HDR, in countries where habilitations exist). CCSD does not make any scientific evaluation of the thesis that are submitted, since this is the responsibiliy of the university professors in the examination board.