What handbook contains information on retail counter procedures for USPS?

The correct choice refers to Handbook F-101, which specifically addresses retail counter procedures for the USPS. This handbook is essential for employees working at retail counters as it provides comprehensive guidelines on how to conduct transactions, handle customer service interactions, and maintain compliance with USPS policies and procedures.

Handbook F-101 presents detailed processes related to accepting mail, selling postage, handling payments, and other retail functions, ensuring that employees can provide efficient and accurate service to customers. It's designed to promote consistency across all retail locations, making it a crucial resource for associates in their day-to-day tasks.

In contrast, the other handbooks listed focus on different aspects of USPS operations and services, such as forms, postal accounting, or specific service standards, which do not pertain directly to retail counter operations. This clear delineation of content underscores why Handbook F-101 is the go-to reference for retail counter procedures.