Physical Sciences Inc.       www.psicorp.com

Physical Sciences Inc. (PSI) was established in 1973 to provide research and technology development services to customers in the US Government and Industry. In the years since, we have grown to over 150 employees with locations in MA, as well as OH, CA, TX, and MD. The company is headquartered in Andover, MA and entirely employee-owned through an ESOP Trust. Originally grounded in laser and optical technologies, PSI has grown in technical breadth to include materials, chemistry, sensors, robotics, and aeronautics. We have also expanded in technical depth to support production, sale, and distribution of numerous products arising from our technical innovations. Through strategic partnerships with multi-national companies, PSI technology is sold in thousands of products worldwide in applications ranging from biomedical instrumentation to industrial gas sensing. Current examples of our product portfolio, research programs, and other news can be found at www.psicorp.com.