TESSCO Technologies Incorporated Common Stock, also called TESSCO, is a technology distributor, manufacturer, and solutions provider serving commercial and retail customers in the wireless infrastructure, and mobile device accessories markets.It operates through Commercial and Retail business segments. The Commercial segment consists of public carriers, government, private system operators, and value-added resellers. Read More The Retail segment is comprised of the market which includes retailers, independent dealer agent, and carriers. The company was founded by Robert B. Barnhill Jr. in 1982 and is headquartered in Hunt Valley, MD.