It was the alarming success of Apple Computer's iPod and iTunes music store that helped prompt the latest challenge from Apple Corps, although the two companies have been sparring ever since George Harrison spotted an ad for Apple Computer in a magazine in 1980.
In the ad serving phase, when your computer requests an advert from the OIX (because a website has included our tag in their page), the browser sends the random number and the categories are used to deliver the targeted ad, not the details of your browsing, or anything about you or your computer.