81.   First, the patients must be able to get a tourist or temporary visa in their countries and come up with the money for the airline ticket.

82.   Federal air traffic control services are paid for by taxes on airline tickets, cargo and fuel.

83.   For example, airline tickets sold over the Internet by Priceline.com carry many of those restrictions and also bar buyers from collecting frequent flier miles.

84.   For example, congressional approval is needed to impose a passenger security fee on airline tickets.

85.   For example, it would allow a customer to book airline tickets and print out boarding passes from an ATM.

86.   For example, the fee would be attached to the cost of a return airline ticket, he said.

87.   For instance, it helps the airline reserve a certain number of seats for business travelers, who usually pay top dollar for airline tickets.

88.   For the moment, the system will be used only for airline tickets.

89.   For example, Priceline.com was granted a patent on its system that lets customers name their own prices for airline tickets and other products.

90.   From gourmet food to airline tickets, the Internet is becoming a popular way to shop.