This package includes only the clients and client libraries needed to access an PostgreSQL server. The server is included in the main package. If all you need is to connect to another PostgreSQL server, the this is the only package you need to install. In this package there are client libraries available for C, C++ and PERL, as well as several command-line utilities you can use to manage your databases on a remote PostgreSQL server. This package now also includes JDBC and ODBC drivers (postgresql.jar and libpsqlodbc.so).