BBj is a software development framework which consists of a dynamic programming language by the same name, an integrated development environment, a GUI forms designer, a Rapid Application Development tool called Barista for generating database-driven graphical applications.

BBj is Java-integrated and optimized for efficiently programming business applications, combining the simplicity of the programming language Business BASIC with the scalability, OS independence and general versatility of Java.

In BBj, the source code is precompiled and interpreted at run time like Visual Basic, Java or C#. This allows dynamic compilation as well as instant testing during development. BBj supports procedural programming as well as object-oriented programming paradigms.

BBj applications can be deployed on all popular operating systems including Mac OS X, Microsoft Windows, Linux, Solaris and other UNIX systems without the need of any changes to the source code.

BBj runs on the Java Virtual Machine on a server. Programmers can enhance their source code with Java resources without restrictions. Its real 3-tier architecture makes BBj applications easy to maintain and deploy. BBj applications can be deployed to a Swing GUI Thin Client, or a Web Thin Client which does not require any JVM on the client device, from the same codebase. There is also a legacy ASCII thin client available.