The Hour of Code is a global movement reaching tens of millions of students in 180+ countries. Anyone, anywhere can organize an Hour of Code event. One-hour tutorials are available in over 45 languages. No experience needed. Ages 4 to 104.
The Potomac River /pÉËtoÊmÉk/ is located along the mid-Atlantic coast of the United States and flows into the Chesapeake Bay. The river (main stem and North Branch) is approximately 405 miles (652 km) long, with a drainage area of about 14,700 square miles (38,000 kmÂ²).n terms of area, this makes the Potomac River the fourth largest river along the Atlantic coast of the United States and the 21st largest in the United States. Over 5 million people live within the Potomac watershed.
Potomac is a census-designated place (CDP) in Montgomery County, Maryland, United States, named for the nearby Potomac River. In 2013, CNNMoney.com listed Potomac as the most affluent town in all the United States based on median household income.