Registry API
The information in the Registry is being made available to software tools developers through a series of API's (Application Programming Interface). These interfaces will change with time.
DAS - Distributed Annotation System
"The distributed annotation system (DAS) is a client-server system in which a single client integrates information from multiple servers. It allows a single machine to gather up genome annotation information from multiple distant web sites, collate the information, and display it to the user in a single view. Little coordination is needed among the various information providers." - Wikipedia