FireBird is an open-source database manager system, originated from Interbase version 6.
This relational database system incorporates many of the features implemented in the ANSI SQL standard.
The program is multi-platform and can work with different operating systems, such as Windows, Mac, and Linux.
Other features in Firebird are: client/server architecture with TCP/IP protocol, support for transactions and foreign keys, security based on users and roles, and much more.
FireBird offers two types of servers: Classic and Super Server. The main difference between the two is in the way the connection is made, since Super Server creates independent threads for each one of them.