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www.usps.com
The official site of the United States Postal Service
www.usps.com/zip4
Search for a zip code, zip4, cities in a zip
code, and more
www.usps.com/businessmail101
Information for beginners on mail for your
business or organization
www.usps.com/mailerscompanion
A free USPS monthly newsletter with latest USPS
information essential to business mailings
www.usps.com/customersguide
A guide of mailing options and USPS services including tips on addressing and packaging your mail
www.postalnews.com
Daily news on the mail industry and links to mail-related news stories
www.gaa1900.com
Graphic Arts Association of Philadelphia web site
www.the-PDMA.org
Philadelphia Direct Marketers Association web site
www.npf.org
National Postal Forum web site
www.dmnews.com
An online newsletter for direct marketers
www.fileamerica.com
Your resource for custom filing systems
www.dmaw.org
Direct Marketing Association of Washington web site
