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The World Health Organization ( WHO) is part of the United Nations (UN), working on international public health, with its headquarters in Geneva, Switzerland. The WHO was established by the UN on April 7, 1948. In the previous year they had already started an epidemiology service. WHO World Health Day is celebrated on April 7.
A device controller is a system that handles the incoming and outgoing signals of the CPU by acting as a bridge between CPU and the I/O devices. A device is connected to the computer via a plug and socket, and the socket is connected to a device controller. Device controllers use binary and digital codes. An IO device contains mechanical and ...
- History
- City Design
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When English people first came to the area, there was a Native American village on the spot called Nakochtank. This name survives in the name of the Anacostia River. This river was known for the healing properties of its pure water and it is recorded that the Emperor Powhatan, who lived in what is now Richmond, Virginia, made the trip all the way t...
Washington, D.C. was planned before it was built. Pierre L'Enfant drew a plan for the city that said where all the streets, parks, and important buildings would be. Unlike most cities in the United States, D.C. has many roundabouts or traffic circles. The city was supposed to have long and wide avenues, and many open spaces for monuments and parks....
Performing arts and music
Washington, D.C. is the center of the nation for its arts. The National Symphony Orchestra, the Washington National Opera, and the Washington Ballet are all inside the John F. Kennedy Center for the Performing Arts. The Kennedy Center Honors are given every year to the people who have greatly helped the cultural life of the United States. The President and First Ladyusually go to the Honors ceremony.
Museums
There are also many museums and memorials in Washington, D.C.. The Smithsonianruns many museums.
Climate
Washington D.C. has a humid subtropical climate (Köppen climate classification: Cfa). Summers are hot and humid, winters are cool to cold, and spring and fallare mild. The average yearly precipitationis fairly high at 42.82 inches (1,088 mm), and is regular throughout the year. Snow falls a few times each winter, and sometimes in spring and fall, which is usually light and lasts no longer than a few days. Blizzardsdo occur, but not every winter. The city gets many summer heat waves that can l...
As the national capital of the United States, Washington, D.C. has numerous media outlets in various mediums. Some of these media are known throughout the United States, including The Washington Postand various broadcasting networks headquartered in D.C.
According to a 2010 study, Washington-area commuters spent 70 hours a year in traffic delays, which tied with Chicago for having the nation's worst road congestion. However, 37% of Washington-area commuters take public transportation to work, the second-highest rate in the country.An additional 12% of D.C. commuters walked to work, 6% carpooled, an...
Guide to Washington, D.C., materials from the Library of Congress
