Which of the following is NOT one of the 5 mail processing categories?

The mail processing categories are essential classifications used by the United States Postal Service to organize and manage various types of mail based on their dimensions, shapes, and handling requirements. Each category is designed to speed up the mail processing system and enhance efficient delivery.

The correct response indicates that "folded pieces" is not officially recognized as one of the five main mail processing categories, which consist of letters, flats, postcards, periodicals, and parcels. While folded pieces may refer to a specific type of mail that could fit into ways of handling or sorting, it does not align with the established classifications used in mail processing. Terms like "letters" and "parcels" are widely accepted and utilized in the postal system, making them distinct categories that dictate how mail is processed and treated.

Understanding these categories enables postal workers to accurately sort and distribute mail, ensuring timely delivery and proper handling. This distinction is vital in the logistics of postal services as it streamlines operations effectively.