dbExpress is a database-independent layer that defines common interface to provide fast access to InterBase and Firebird databases from Delphi on Windows and Mac OS X for both 32-bit and 64-bit platforms. For these servers dbExpress provides a driver as an independent library that implements the common dbExpress interfaces for processing queries and stored procedures. As a thin and simple data-access layer dbExpress provides high performance database connectivity and is easy to deploy. dbExpress driver for InterBase and Firebird provides access to InterBase and Firebird databases. It directly uses InterBase client software to connect to server. dbExpress driver for InterBase and Firebird supports InterBase starting with the version 5.x and Firebird 2.x and 1.x version. The driver requires InterBase client to be installed on the client side.