Ключевые слова: amplifier, audio equipment, backgrounds, black color, blue, broadcasting, building feature, business, closeup, communication, computer, computer monitor, concepts, control, copy space, design, digitally generated image, domestic room, electrical equipment, electricity, electronics industry, equipment, front view, home interior, ideas, indoors, internet, isolated, metal, modern, multimedia, no people, office, order, playing, power supply, recording studio, selective focus, shiny, single object, speaker, stereo, surveillance, technology, telephone, wall, watching, webcam, wireless technology,