DGH Electronics Corp

MKS Instruments is one of the world s leading providers of subsystems and process control solutions that controls, monitors and measures the parameters of manufacturing processes. It offers leak detection, vacuum fabrication, and gas and vapor delivery systems. The company provides ozone products, vacuum gauges and valves. MKS Instruments also offers heater jackets for stainless steel vacuum components. It provides products under the SenseLink, PICO and HPS brands. The company serves the flat panel display, data storage, material processing, industrial, pharmaceutical, medical imaging, semiconductor, and air and gas analysis markets. MKS Instruments offers a range of repair, calibration and technical support services.

ADE Corporation, headquartered in Westwood, Mass., is among the worldwide leaders in automated metrology and inspection systems for the wafer manufacturing and computer disk drive industries. Founded in 1967 by Robert C. Abbe, the company became public in October 1995. ADE employs more than 400 employees and has sales and service offices worldwide. ADE s WaferCheck, MicroScan, UltraScan and UltraGage systems provide automated high-speed measurement and sorting of silicon wafers. ADE Software designs offline analysis tools which allow process engineers to focus on solutions instead of data collection and analysis, turning all of the data into useful and easily accessible information. ADE s UltraGage equipment is used both in the wafer and device-manufacturing markets, which is used for development and analysis for photolithography, thin film stress and backgrind processes. ADE Technologies and ADE Phase Shift, wholly owned subsidiaries of ADE Corporation, now offer disk media manufacturers automated production tools.

Tech/Ops Sevcon is organized into two business segments: Sevcon manufactures electric motor controllers and system components for battery-powered vehicles, and ICW manufactures special metallized film capacitors for electronics applications. These capacitors are used as components in the power electronics, signaling and audio equipment markets. Sevcon markets these products to a global customer base that ranges from forklift truck manufacturers to electric scooter manufacturers. ICW is located in the United Kingdom. Founded in 1968, Tech/Ops Sevcon also has subsidiaries in Tokyo, Paris and Seoul, Korea. Tech/Ops Sevcon does not offer a direct stock purchase plan. Tech/Ops Sevcon common stock can be bought or sold through a financial institution that provides brokerage services. The Sevcon segment, located in Scarborough, Mass., produces AC controllers, DC controllers, electric steering systems, pump motors, displays and gauges, battery chargers and DC converters.