Ключевые слова: abstract, app, appointment, business, button, calendar, calender, concept, content, control, date, day, design, desktop, device, event, flat, game, goods, graphic, group, icon, interface, isolated, media, mobile, modern, month, network, numeration, office, page, paper, period, phone, plan, reminder, set, sign, smartphone, symbol, system, table, tablet, time, web, weeks, year,