Which document type contains the most detailed instructions on Postal Service operations?

The correct answer is handbooks because they serve as comprehensive guides that detail the policies, procedures, and operational standards of the Postal Service. Handbooks are designed to provide employees with clear and thorough instructions on a wide range of topics related to their duties, ensuring that they have access to the necessary information to perform their jobs effectively.

In contrast, reports often summarize data and findings related to specific topics or events but do not typically contain step-by-step operational instructions. Takeaway forms are generally used for quick reference or summary information rather than in-depth guidelines. Notices tend to communicate specific updates or changes that may not elaborate on procedures in detail. Therefore, handbooks are the most valuable resources for understanding the full scope of Postal Service operations.