Resource List: Postal Information
- State Abbreviations and State Postal Codes
- International Postal Rates
- The Mail-Order Merchandise Rule
- Sizes for Domestic Mail
- Special Services (Domestic Mail)
- Media Mail (Book Rate)
- Priority Mail Flat-Rate Envelope
- Express Mail
- First-Class Mail
- Women Who Left Their “Stamps” on History
- All-Time Top 25 Most Popular Commemorative Stamps
- Postal Workers Bitten by Dogs, by District
- Postal Information
- Postal Workers Bitten by Dogs, by District
- Postal Workers Bitten by Dogs, by District
- Postal Workers Bitten by Dogs, by District
- U.S. Letter Rates Since the Civil War
- ZIP Codes
- Postal Information Websites
- How to Complain About a Postal Problem
