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Systems at Work leads you through 10 different moments in the nation’s history. Together, they reveal the great changes and striking similarities in the postal system over time—how it works, how it connects people, and its profound importance to the nation.

     Postal workers Thomas Morris, Jr. and Joseph Curseen, Jr. died from inhalation of anthrax in October 2001      Pony Express is run as a private mail service between April 1860-October 1861      Harry Winston mailed the Hope Diamond to the Smithsonian on November 10, 1958      58 million pieces of mail sent in Free Matter for the Blind program      Postal Service 2nd largest US civilian employer      There are 192,180 city letter carriers in the US      There are 66,845 full time rural delivery carriers in the US      Postal Service employs 4,985 vehicle maintenance workers      There are 23,111 postmasters in the US      USPS has world’s 3rd largest computing infrastructure      Breast Cancer Research semi-postal stamp sales raised more than $71.7 million      Morgan post office in New York has 2.5 acres green roof      44,000 alternative fuel vehicles in the postal fleet      Over 30% of city carriers deliver mail on foot      Mule trains continue to carry mail in the Grand Canyon      23 million pieces of mail processed each minute      40% of the world’s mail volume handled by USPS      215,625 vehicles in the US postal fleet      There are more than 42,000 ZIP codes in the U.S.      Longest rural route is 182.8 miles in Gridley, KS      General Electric’s Schenectady, NY office has the 12345 ZIP code      Shortest rural mail route is 2.9 miles in Henderson, NV      Highest ZIP code number is 99950 – Ketchikan, Alaska      Lowest ZIP code number is 00501 – an IRS office in Holtsville, NY      Postal Service has world’s largest alternative fuel fleet      Postal Service has world’s largest civilian vehicle fleet      6,516 pieces of mail processed each second      391,000 pieces of mail processed each minute      6.7 million passport applications accepted      63,000 stores, banks and ATMS sell stamps in the U.S.      735,779 new addresses added to US postal system in 2010      258.1 million pieces of First-Class mail delivered      407,267 money orders issued by post offices      Postal Service has 583,908 employees      Machines read 93% of all hand-addressed mail      Advanced Facer Canceller System (AFCS) processes 36,000 pieces per hour      Delivery Barcode Sorter (DBCS) sorts 36,000 pieces of mail per hour      Automated Flat Sorting Machine (AFSM) sorts 17,000 pieces per hour      Automated Package Processing System (APPS) processes 9,500 packages per hour      Postal Service employees provide $38 million annually to the Combined Federal Campaign      Highway Post Office bus service begins on February 10, 1941      Pneumatic mail service begins in US on March 1, 1893 in Philadelphia      A wildcat postal strike cripples mail service in March 1970      Railway Mail Service ends on June 30, 1977      Postal Inspectors arrested 6,000 suspects in 2010 for crimes involving mail      Postal Inspectors seized $7.7 million from the mail in proceeds related to drugs in 2010      Postal Inspectors have 18 mobile command centers ready when needed in disasters      27,000 counterfeit postal money orders, worth nearly $26 million seized      First mail carried by balloon in the US on August 17, 1859      Post Office Department ships $20 million in gold for the Treasury Department in 1892      Post Office Department declares all railroads to be “post roads” in 1838      Money Orders are created in 1864, limited at first to $30      First US postal cards are issued in 1873      Highest elevation US post office is Leadville, Colorado at 10,150’ above sea level      Lowest elevation US post office is Mecca, California at 180’ below sea level      Westernmost US post office is in Wales, Alaska      Easternmost US post office is in Lubec, Maine      Southernmost US post office is in Key West, Florida      Northernmost US post office is in Barrow, Alaska      Smallest US post office is in Ochopee, Florida at 61.3 square feet      Longest Main Street in US is in Island Park, Idaho at 33 miles long      Benjamin Franklin and George Washington were on the first US stamps      Only 61,296 of the 1930s Graf Zeppelin stamps were sold, fewest of any definitive issue      US Postal Service is the largest delivery service in the world      There were 75 post offices in operation in the US in 1790      There were 903 post offices in the US in 1800 and 76,688 in 1900      Longest serving post office in the same building is in Hinsdale, NH, since 1816      171 billion pieces of mail processed in 2010      41.5 million address changes processed in 2010      25.1 billion stamps printed in 2010      239 postal employees recognized as heroes in 2010      The Anaktuvuk Pass, Alaska post office is the most isolated      Clinton is the most common US post office name      Madison is the second most common US post office name      Franklin and Washington tie for the third most common US post office names      The most common US street names are Second, Park, Main, Maple, and Oak      ZIP codes now used by businesses, governments and 911 emergency systems      “Have You Seen Me” missing children mail campaign returned 149 children to their families      There are 27,077 post offices and retail facilities in the US      First Class mail is 46% of the mail and returns 51% of the revenue      USPS had a net loss of $8.5 billion for the fiscal year.      658 million packages delivered in 2010      7.2 billion periodicals delivered in 2010      Mail is delivered to 15.7 million post office boxes in the US      Mail is delivered to 80.5 million city addresses      Mail is delivered to 38.6 million rural addresses      260 Mail Processing and Distributing Centers in the US      2 Remote Coding Centers remain in the US      US mail volume peaked at 213 billion pieces in 2006      US letter carriers hold largest 1-day food drive, 77.1 million lbs. of food collected in 2010      Testing 3-wheeled electric delivery vehicles with zero emissions      The first post offices in America were bags hung in taverns      The first US stamps were issued in 1847      Free city delivery began in 1863      Rural free delivery began as an experiment in 1896      Parcel post service began in 1913      US had the first regularly scheduled airmail service, it began in 1918      Four digits added to the ZIP code in 1983      Smithsonian National Postal Museum opens in 1993      US begins testing self-adhesive postage stamps in 1974