Each record in the snapshot database, the getin/getout databases, the list database, and the parse database has an author field in which an author identification number is placed. Hence the program can tell the source of the records, and can choose whether to update specific records or not. The snapshot database and getin/getout databases can be searched on the author field to find records created/edited by others. Also, when you receive program and database upgrades from me, the upgrade process only replaces those records created by me (records created by you or others are retained). In this manner, your databases are upgraded without destroying any records that you have added/edited.