Ключевые слова: 24, assistance, background, business, button, call, center, communicate, communication, concept, connection, contact, conversation, customer, day, design, dial, element, equipment, flat, graphic, help, hotline, hour, icon, illustration, internet, isolated, logo, media, mobile, modern, multimedia, network, office, operator, phone, professional, service, sign, simple, studio, support, symbol, technology, telephone, template, time, website,