When The Tech Visionaries Began dreaming of an information superhighway decades ago, they didn't anticipate how quickly it would become littered with billboards. Check your e-mail or browse the Web for a few minutes and you're likely to encounter dozens of spam messages or pop-up advertisements offering solicitations unfit to be reproduced in a family-oriented magazine. Even legitimate Web pages are teeming with links to Amazon and eBay. The commercial clutter of the online world has grown so extreme that many online service providers have stopped selling the dream of connecting you to a world of information and are advertising tools for blocking spam.
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