Ключевые слова: aid, background, book, business, care, clinic, color, computer, concepts, data, diagnostic, differential, doctor, equipment, examination, focus, foreground, health, healthcare, heartbeat, horizontal, hospital, illness, instrument, internet, isolated, key, keyboard, laptop, listening, man, media, medical, medicine, networking, nobody, occupation, online, paper, professional, record, repairing, research, retro, service, stethoscope, supplies, support, technology,