CDW Corp. engages in the provision of information technology solutions to small, medium, and large business, government, education, and healthcare customers. It operates through the following segments: Corporate, Small Business, Public, and Other. The Corporate segment serves US private sector business customers with more than 250 employees. The Small Business segment focuses on the US private sector business customers with up to 250 employees. The Public segment includes government agencies and education and healthcare institutions. The Other segment focuses on CDW UK and Canada. The company was founded by Michael P. Krasny in 1984 and is headquartered in Vernon Hills, IL.