[Code of Federal Regulations] [Title 41, Volume 3] [Revised as of July 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 41CFR102-192.40] [Page 349] TITLE 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT CHAPTER 102--FEDERAL MANAGEMENT REGULATION PART 102-192_MAIL MANAGEMENT--Table of Contents Subpart A_General Provisions Sec. 102-192.40 Where can I get more information about the classes of mail? Details about mail classes can be found in the Domestic Mail Manual (DMM). The DMM is available from New Orders, Superintendent of Documents, U.S. Government Printing Office, P.O. Box 371954, Pittsburgh, PA 15250-7954, http://pe.usps.gov/.