Wholesaling and vending, namely mail-order vending, of tickets and vouchers for services provided by others; wholesaling and vending, namely mail-order vending, of tickets for sporting and entertainment services; wholesaling and vending, namely mail-order vending, of tickets and vouchers for accommodation, vehicle rental, restaurants, hotel accommodation and travel services; computer data base services in this class, and providing facilities for co-ordinating and conducting exhibitions and trade shows, authentication and information in respect of bookings and tickets