What part of the technical manual identifier denotes that the manual is appropriate for vehicle operator?

The part of the technical manual identifier that indicates the manual is appropriate for vehicle operators is typically the suffix or designation that follows the main identifier. This designation often includes a specific code or number that signifies the manual's intended audience, such as "TM" for training manuals or "OM" for operator manuals. These identifiers help users quickly identify the manual's purpose and ensure they are referencing the correct material for operating the vehicle.