Cloudscape was always a lightweight embedded database, but when IBM contributed Apache Derby they also contributed a TCP/IP network server that speaks Distributed Relational Database Architecture (DRDA) protocol -- the lingua franca of relational databases. Any database driver that speaks DRDA can talk to Derby over TCP/IP; the most common examples include: *JDBC*: both the IBM DB2 Universal JDBC driver and the open source Derby driver contributed by IBM *CLI / ODBC*: the IBM DB2 Universal Database client provides a C interface for translating CLI/ODBC calls into DRDA As there is currently no open-source DRDA implementation for a CLI/ODBC driver, this tutorial relies on the use of the DB2 client to provide access to Derby from Perl, PHP, and Python.