Copyright Management and Control Systems: Pre-Infringement Pre-infringement copyright management and control systems that inhibit or control infringement of intellectual property may be put into place by copyright owners before distributing their works. Examples are: Contracts Contracts are a pre-infringement control method, which very often is underestimated. Properly formed contracts enable copyright holders to restrict the use of their works in excess of the rights granted under copyright laws. Copy Protection This approach was standard in the 1980s, but rejected by consumers and relatively easy to break. Still copy protection, whereby the vendor limits the number of times a file can be copied, is used in certain situations. Limited Functionality This method allows copyright owners to provide a copy of the work, which is functionally limited. Software creators, for example, can distribute software that cannot print or save. A fully functional version has to be bought from the vendor. Date Bombs Here the intellectual property holder distributes a fully functional copy but locks off access at a pre-specified date or after a certain number of uses.

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Sony Corporation Japanese SONY KK, major Japanese manufacturer of consumer electronics products. Headquarters are in Tokyo. The company was incorporated in 1946 and spearheaded Japan's drive to become the world's dominant consumer electronics manufacturer in the late 20th century. The company was one of the first to recognize the potential of the consumer videotape market. In 1972 it formed an affiliate to market its Betamax colour videocassette system. In 1987-88 Sony purchased the CBS Records Group from CBS Inc., thus acquiring the world's largest record company. It followed that purchase with the purchase in 1989 of Columbia Pictures Entertainment Inc.

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