FileMaker Pro is a cross-platform relational database application from FileMaker Inc., formerly Claris, (a subsidiary of Apple). It integrates a database engine with a GUI-based interface, allowing users to modify the database by dragging new elements into layouts, screens, or forms. Current versions are: FileMaker Pro 11, FileMaker Pro 11 Advanced, FileMaker Pro 11 Server and FileMaker Pro 11 Server Advanced. FileMaker evolved from a DOS application, but was then developed primarily for the Apple Macintosh. Since 1992 it has been available for Microsoft Windows as well as Mac OS, and can be used in a heterogeneous environment. It is available in desktop, server, and web-delivery configurations.