The Philip Glass engine, that is.

The Philip Glass website has online a deep navigation tool called 'The Glass Engine' developed as an ongoing research project at the IBM T. J. Watson Research Center.

The Engine allows you to navigate the collected musical works of composer Philip Glass based on a number of criteria: year, length, emotion, etc. and how the criteria interact with one another.

The engine requires IE 4.5 or higher and works best in a higher bandwidth environment.