The Compendium of Copyright Office Practices II (also referred to as "Compendium II: Copyright Office Practices") is an internal manual of procedures to be followed by Copyright Office examiners. It is now deemed by the Copyright Office to be extremely out of date. However, its many definitions are still instructive.
The second edition of the compendium has now been replaced by the Compendium of U.S. Copyright Office Practices, Third Edition.