...
When you complete cataloging a bibliographical record, add a 902 field as a distinct indication that the record is done. Adding a 902 is one of the final actions that must be taken on all bib records.
How to create a template to add 902 tags to copy catalogued records
Purpose of 902 field
The local 902 field was created in 2000 when PUL began using Voyager. It was initially intended to replace paper cataloger statistics sheets. Staff added 902 when finishing a new record.
...