Ключевые слова: air, aircraft, airline, airplane, airport, app, application, apps, bar code, boarding, boarding pass, booking, business, buying, card, checkin, code, commercial, communication, concept, eboarding pass, electronic, eticket, flight, fly, hand, holding, internet, mobile, online, pass, passenger, phone, plane, qr, screen, smart, smartphone, social, technology, ticket, tickets, tourism, tourist, transport, transportation, travel, trip, using, virtual,