The clidata system operation usage starts in 1999. The system is installed on seven sun servers with Solaris 5.8 operation system. Since 2001 the clidata works in replication model, it means the data are shared between these servers. Currently the system is installed on the Oracle Database release 9.2. In addition to standard Clidata client application the users can work with internet and java oriented clients. For the data extraction the users use mainly the Oracle Discoverer release 4.1.45.