Ключевые слова: alarm, alert, area, attention, barrier, black, caution, cellphone, cellular, character, concept, contact, danger, defense, delineator, detention, display, email, fence, icon, isolation, letter, line, message, metaphor, mobile, obstacle, online, pillar, post, problem, protection, quarantine, red, ribbon, safety, screen, security, sign, smartphone, social, striped, symbol, tape, touch, touchscreen, warning, yellow, zone,