U.S. Postal Service to end Saturday mail delivery

photo Peggy Robertson prepares a package for shipment Wednesday while other customers wait in line at the post office on North Market St. in Chattanooga, Tenn.

photo Postal Service employee Shu Wang tapes a customer's package Wednesday at the post office on North Market St.

KEY DATES1775: Benjamin Franklin appointed first postmaster general by the Continental Congress1847: U.S. postage stamps issued1860: Pony Express began1863: City mail delivery began1893: First commemorative stamps issued1896: Rural mail delivery began1918: Scheduled airmail service began1950: Residential deliveries reduced to one a day1963: ZIP Code system inaugurated1971: United States Postal Service began operations1983: ZIP+4 Codes begun1992: Self-adhesive stamps introduced nationwide1994: Postal Service launched public Internet site2006: Postal Accountability and Enhancement Act signed2013: Saturday mail delivery endsSource: U.S.