The specific cause of Parkinsonâs is unknown; however, medical experts believe the symptoms are related to a chemical imbalance in the brain caused by brain-cell death. Parkinson's disease is chronic (persists over a long period of time), and progressive (symptoms grow worse over time).arkinson's disease (or, simply, Parkinson's or PD) is the most common form of parkinsonism, a group of motor system disorders.
Quick Answer. Non-mandatory ZIP codes were introduced to the United States in 1963. Robert Moon, a postal inspector with the United States Postal Service, proposed the ZIP code system as early as 1944. Continue Reading.
Mr. Zip - A cartoon character, created by Harold Wilcox of the Cunningham and Walsh advertising company, used by USPS in the 1960s and '70s to promote the ZIP Code system. Secret - The President and his family have their own, private ZIP Code that is not publicly known. 1  History of Post Office Technology. 2  Two Letter US State and Possession Postal Service Abbreviations. 3  Free Downloadable ZIP Codes Database for Microsoft Access. 4  Mail Delivery Could be Even Slower Than USPS Admits, GAO Finds.