Media Summary: July 1, 1963 was a red-letter day for the U.S. Post Office, for it marked the introduction of its Zoning Improvement Plan - Though we usually take it for granted today, the development of a system that allows nearly anyone to hand off a package and ... New research shows where you live matters.
Why Zip Codes Have 5 - Detailed Analysis & Overview
July 1, 1963 was a red-letter day for the U.S. Post Office, for it marked the introduction of its Zoning Improvement Plan - Though we usually take it for granted today, the development of a system that allows nearly anyone to hand off a package and ... New research shows where you live matters. Thank you, Bonnie Bees, for making this video possible: ## Related Videos: What is Federal ... Watch more How to Mail Letters & Packages videos:
