Cd Ro Ms: You Pay Only For What You Decode

Computer disks known as CD-ROMs store vast amounts of data and often come with equally big price tags: Since there has been no way to track how much data will be used, CD-ROM publishers have charged for everything on a disk. But not for much longer. Cryptologics Inc. in New York City has developed a meter that gauges data use just as an electric meter tracks power demand.

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