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.
What year did zip codes start?   In the US 2 digit postal codes started in 1943 because many of the regulay postal clerks were away fighting WWII and the government the codes would help the inexperienceâ¦d new clerks in sorting the mail. 5 digit Zip codes went into effect on July 1, 1963.