(An asterisk (*) indicates an organizational class or group, not a Postal Service product.)

First-Class Mail*

Single-Piece Letters/Postcards

Presorted Letters/Postcards

Flats

Outbound Single-Piece First-Class Mail International

Inbound Letter Post

USPS Marketing Mail (Commercial and Nonprofit)*

High Density and Saturation Letters

High Density and Saturation Flats/Parcels

Carrier Route

Letters

Flats

Parcels

Every Door Direct Mail—Retail

Periodicals*

In-County Periodicals

Outside County Periodicals

Package Services*

Alaska Bypass Service

Bound Printed Matter Flats

Bound Printed Matter Parcels

Media Mail/Library Mail

Special Services*

Ancillary Services

International Ancillary Services

Address Management Services

Caller Service

Credit Card Authentication

International Reply Coupon Service

International Business Reply Mail Service

Money Orders

Post Office Box Service

Customized Postage

Stamp Fulfillment Services

Negotiated Service Agreements*

Domestic*

International*

Inbound Market Dominant Multi-Service Agreements with Foreign Postal Operators

Nonpostal Services*

Alliances with the Private Sector to Defray Cost of Key Postal Functions

Philatelic Sales

Market Tests*

Plus One

Commercial PO Box Redirect Service

[85 FR 45316, July 28, 2020]