At first, only travel agents used global distribution systems. The Internet allowed online travel agents, but soon airlines began selling ancillary services on their websites that were not offered by GDS. As airlines moved from selling tickets from " 'price and schedule' to include ancillary options, the websites became the only vehicles that could adequately support that," Cranky Flier says. And this "really is a good thing," according to Cranky Flier.
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