In 1995 the German federal office for information security, the BSI, published its first IT-Grundschutzhandbuch, a handbook of standard security measures for computer systems. It began with 18 modules and 200 measures. At the end it had 58 modules and 720 measures, and it had grown from 150 to 2,550 pages. In 2006 it was split up into standards and catalogues, and in October 2017 the catalogues were replaced by a new compendium. Organizations can be certified on the basis of these written measures.