Travelers who use Orbitz may want to pay attention to what computer they're on when it comes time to book a vacation. The Wall Street Journal reported that the online travel agency has been experimenting with showing Mac users higher hotel prices than PC users. To be clear, Orbitz is not charging Mac and PC users different prices for the same hotels. Instead, the first results a Mac user sees after a hotel search may be pricier than those seen by a PC user. Rick Seaney, CEO of FareCompare, told "Good Morning America," "If you're the kind of person who likes to pay for premium things, certainly, if I'm Orbitz, I want to offer you those things first." Read the full story at ABC News.