MacOS X's Mail and Address Book have large AppleScript dictionaries which allow almost every aspect of these programs to be scripted. Since some features are rather cumbersome in the standard implementation, Andreas decided to write some scripts to ease workflow. He started writing the scripts after the release of MacOS X 10.2 (Jaguar) and made several improvements and additions over time. After the release of MacOS X 10.3 (Panther) all scripts have been completely rewritten as AppleScript Studio applications allowing for many additional features.