Future directions Add mode to do side-by-side comparison of two versions Possibly also add three-way comparison... Is it useful to combine a history browser with a merge tool? Additional information can be distracting during a merge Could help find code that's been modified by one person and relocated by another But is integration necessary for that? More interesting: add a cross reference utility Cross referencing the complete version history can answer useful questions "When was the last use of this routine deleted?" "Where was this code used when it was written?" Auditorium visualization (Terveen and Hill) Requires close integration with version control system