37 Installation, upgrading, rebuilding, repair, and maintenance of electromechanical control apparatus and equipment, namely, data input, data processing and data output terminals, keyboards, computer mice, touch pads, pointers, microprocessors, central processing units, lap-top computers, personal computers, workstations, display screens, and printers; installation, upgrading, rebuilding, repair and maintenance of optical measuring apparatus, namely projectors, lighting, cameras and devices for optical inspection of semiconductors, original equipment manufacturer (OEM) application devices, water bump inspection devices, and IC packaging; installation, upgrading, rebuilding, repair and maintenance of test systems, namely X-ray inspection equipment for surface mount devices (SMD), high resolution X-ray inspectors and ultra high resolution X-ray analyzers for inspecting semiconductor materials, integrated circuits and printed circuit boards; installation, upgrading, rebuilding, repair and maintenance of industrial X-ray machines for other than medical use, namely for inspection of components; installation, upgrading, rebuilding, repair and maintenance of automatic assembly machines for electronic circuits, namely semiconductor production and assembly apparatus for wafer thinning, wafer mounting, singulation, die bonding, trimming, forming, molding, curing, laser marking, ball mounting, printing of semiconductors; high-performance contact materials for semiconductors; consumable articles for semiconductors, namely cleaning sheets, pot and plunger for mold equipment, semiconductor molds, magazines and wafer frames, upgrading and rebuilding, installation and repair of inspection apparatus and production machinery for use in the manufacture and quality assurance of semiconductors and printed circuit boards