9 Junction boxes; connections for electric lines; holders for securing electric components for surveillance cameras, audio speakers, daylight and photo sensors, occupancy motion sensors, and smoke detectors; fire alarms; holders for securing fire alarms; loudspeakers; cabinets for loudspeakers; holders for securing loudspeakers and loudspeaker boxes; optical apparatus, namely, optical character recognition apparatus, optical character recognition (OCR) apparatus, optical inspection apparatus for industrial use, optical inspection apparatus for inspection of semiconductor materials, namely, semiconductor wafers, reticles, and photomasks, optical inspection apparatus, photovoltaic installation apparatus, namely, solar modules for production of electricity, solar thermal and electric receivers, tracking mechanisms and concentrating optics, and control algorithms, and scientific and technical apparatus, namely, optical mirrors; holders for securing optical apparatus, namely, optical character recognition apparatus, optical character recognition (OCR) apparatus, optical inspection apparatus for industrial use, optical inspection apparatus for inspection of semiconductor materials, namely, semiconductor wafers, reticles, and photomasks, optical inspection apparatus, tracking mechanisms and concentrating optics, and control algorithms, and scientific and technical apparatus, namely, optical mirrors; camcorders; holders for securing video cameras; commutators