The Boise-Nampa, Idaho metropolitan statistical area (MSA) encompasses Ada, Boise, Canyon, Gem and Owyhee counties and has more than 18,000 businesses. Trade, utilities and transportation is the largest employment sector, followed in order by professional and business services, government, manufacturing, education and health services. Boise is the headquarters for the sectors largest employer Micron Technology, which retains 10,600 people.