Advantest is engaged in the design, production, and sale of automated test equipment used in the manufacture of semiconductors; and measuring instruments used in the design, production and maintenance of electronics hardware, including wireless communications and fiber optic equipment and digital consumer products. Co.'s principal products include spectrum analyzers, microwave spectrum analyzers, network analyzers, digital network measuring equipment, optical measuring instruments and optical device test systems, and EMC measuring equipment; LSI test systems, LCD driver IC testing equipment, memory test systems and system software; and e-beam lithography systems.