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³ This article concerns the recent development of an entire industrial sector. It is broader in scope than the typical Business History Review article, though not unprecedented (see, for example, Langlois's, Richard 1992 study of the development of the microcomputer industry, “External Economies and Economic Progress: The Case of the Microcomputer Industry,” Business History Review 66: 1–50)CrossRefGoogle Scholar. Consequently, the range of sources we have consulted is also not typical. Because the events described are recent, we are more than usually reliant on the contemporary business and technical press. Few academic studies have yet been made, and primary sources, such as industry-analyst reports and corporate records, are not gener-ally in the public domain. These, in any case, would likely be subject to a twenty- or thirty-year embargo on disclosure.

⁴ In justifying this choice of model, we note that broadcasting and telecommunications are similar technological systems with an appliance-infrastructure-services industrial structure.

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⁸ Ibid., 98.

⁹ Ibid., 330.

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