Ключевые слова: 3d, access, alert, attention, background, ban, block, business, button, caution, close, communication, computer, danger, design, entry, flat, forbid, forbidden, graphic, icon, illustration, information, internet, isolated, laptop, law, mobile, negative, no, pictogram, prohibit, prohibition, rejection, restrict, restriction, risk, road, safety, security, stop, symbol, technology, transportation, warning, web, wrong,