# Introducing Derby

Welcome to Derby! Derby is a relational database management system (RDBMS) that is based on Java™ and SQL.

This section describes Derby.

- Deployment options
  You can deploy Derby in a number of different ways.
- System requirements
  Derby is a database engine written completely in Java; it will run in any certified Java Virtual Machine (JVM).
- The Java DB library
  The Java DB library includes the Java DB manuals and API reference.