Copyright Management and Control Systems: Metering Metering systems allow copyright owners to ensure payment to or at the time of a consumer's use of the work. Those technologies include: Hardware Devices Those have to be acquired and installed by the user. For example under a debit card approach, the user purchases a debit card that is pre-loaded with a certain amount of value. After installation, the debit card is debited automatically as the user consumes copyrighted works. Digital Certificates Hereby a certification authority issues to a user an electronic file that identifies the user as the owner of a public key. Those digital certificates, besides information on the identity of the holder can also include rights associated with a particular person. Vendors can so control access system resources, including copyrighted files, by making them available only to users who can provide a digital certificate with specified rights (e.g. access, use, downloading). Centralized Computing Under this approach all of the executables remain at the server. Each time the executable is used, the user's computer must establish contact with the server, allowing the central computer to meter access. Access Codes Access code devices permit users to "unlock" protective mechanisms (e.g. date bombs or functional limitations) embedded in copyrighted works. Copyright owners can meter the usage of their works, either by unlocking the intellectual property for a one-time license fee or by requiring periodic procurement of access codes. Copyright Clearinghouses Under this approach copyright owners would commission "clearinghouses" with the ability to license the use of their works. A user would pay a license fee to obtain rights concerning the intellectual property.

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AT&T AT&T Corporation provides voice, data and video communications services to large and small businesses, consumers and government entities. AT&T and its subsidiaries furnish domestic and international long distance, regional, local and wireless communications services, cable television and Internet communications services. AT&T also provides billing, directory and calling card services to support its communications business. AT&T's primary lines of business are business services, consumer services, broadband services and wireless services. In addition, AT&T's other lines of business include network management and professional services through AT&T Solutions and international operations and ventures. In June 2000, AT&T completed the acquisition of MediaOne Group. With the addition of MediaOne's 5 million cable subscribers, AT&T becomes the country's largest cable operator, with about 16 million customers on the systems it owns and operates, which pass nearly 28 million American homes. (source: Yahoo) Slogan: "It's all within your reach" Business indicators: Sales 1999: $ 62.391 bn (+ 17,2 % from 1998) Market capitalization: $ 104 bn Employees: 107,800 Corporate website: http://www.att.com http://www.att.com/

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