Arlington County benefits greatly from its location on the border of Washington DC. It is home to the Pentagon, the Defense Advanced Research Projects Agency (whose research created the Internet) and the National Science Foundation. More than 8,000 Federal employees work there, and tens of thousands more private-sector and nonprofit jobs are enabled by Federal spending. The concentration of nationally-known universities has given the county a remarkably educated workforce, in which more than 73% of adult residents has a graduate degree. Its high-tech public school system is ranked in the top 2% nationwide.
