| Topic | Description |
| Address Changes | Online help for movers |
| Coding Accuracy Support Systems (CASS) | Vendors Cass/ Mass product development Information |
| Direct Mail | How to plan, execute and deliver a direct mail campaign |
| General Information | USPS home page |
| Global USPS Products | Information on global delivery services |
| Mail Preparation | Mail preparation total quality management site |
| Memo to Mailers | USPS customer focused articles and news brief |
| National Customer Council | Address management products, services and publications |
| National Postal Forum | Postal Forum Information |
| Passport Information | Information on applying for US passports |
| Priority Mail E-Commerce | Information on shipping online purchases with Priority Mail |
| Global Express Guaranteed | Information on service time guaranteed enhancement to Global Priority Mail |
| Post Office Locator | Information on locating a post office close to your home or business |
| Postal Bulletin | Updates to USPS policies and procedures |
| Postal Explorer | Postage rates & fees, DMM(Domestic Mail Manual information customer support rulings, various publications |
| Postal Inspectors | Postal Inspection Service locator, information on consumer fraud and other crimes |
| Publications/Technical | Directory of Address Management files and publications |
| Postal Rates and Fees | Postal Rates and Fees |
| Shipping | Estimate shipping charges |
| Shipping supplies | Online Ordering Express and Priority Mail supplies online |
| Stamps Online | Stamp products for sale online |
| Target Marketing | "How To" magazine for direct marketers |
| Track/Confirm | Track/confirm delivery of Express Mail, Priority Mail, Parcel Post with delivery confirmation, Priority Mail Global Guaranteed |
| Zip Code Lookup/Information | Zip+4 locator |
