optical apparatus and instruments; namely, lenses for eyeglasses, contact lenses, vision correcting eyeglasses, eyeglass cases, magnifying glasses, binoculars, prismatics, microscopes, trichinoscopes; environmental room thermometers not for medical use; barometers; hygrometers; altimeters; magnetic needles for compasses; audio and video records and players; coin operated audio players; cash registers; calculators; data processing equipment, namely microprocessors and computers; and fire extinguishers