The group's principal activities are to design, manufacture and sell data acquisition, signal and imaging processing based medical imaging and industrial systems and subsystems. The group operates through two business segments: imaging technology products and signal processing technology products. Imaging technology products consist primarily of electronic systems and subsystems for medical imaging equipment and advanced explosive detection systems. Signal processing technology products consist of analog to digital (a/d) converters and supporting modules, and high-speed digital signal processors. It also owns a hotel, which is located in the area of Boston's north shore.