Ключевые слова: 24, assistant, business, call, commerce, contact us, customer, design, e commerce, electronic, element, flat, headphone, headset, help, helpline, hotline, hours, icon, interaction, line, material, modern, network, online, phone, pictogram, pictograph, process, round, secretary, service, shop, square, support, system, technical, telemarketing, telephone, white,