Ключевые слова: alternative, audio, audiobook, background, book, color, concept, copy, device, digital, earmuffs, earphones, education, entertainment, equipment, gadget, hardcover, headphones, headset, hobby, information, learn, leisure, library, listen, literature, modern, music, object, paper, read, recording, red, school, sound, space, stereo, study, table, talking, teaching, technology, text, textbook, university, volume, wireless, wooden, work,