http://www.accuracyproject.org/abbreviations.html http://www.accuracyproject.org/abbreviations.html U.S. Postage Rates and Postal Service State Abbreviations U.S. Postage Rates http://www.accuracyproject.org/abbreviations.html Accuracy Project: U.S. Postal Service Postage Rates http://www.accuracyproject.org/abbreviations.html