The public relations industry, the same as advertising, is concentrated in the hands of few dominant firms. Still, the striking element about corporate public relations is that PR firms are tightly related to advertising companies. Nine out of the ten biggest international PR agencies have close ties with the advertising industry. Also, looking at the largest acquisitions involving U.S. PR firms from 1997 to 1999 it is apparent that money coming from advertising agencies has played an important role.
Table: Top 10 PR Firms 1998
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With many PR agencies sold to advertising companies, the advertising industry's influence further increases; enabling them to offer their clients not only advertising services, but also know-how in marketing, public opinion, crisis and issues management and political lobbying.
Table: Acquisition of PR Agencies (1997 - 1999)
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Source: Odwyerpr.com.
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Claude Chappe built a fixed optical network between Paris and Lille. Covering a distance of about 240kms, it consisted of fifteen towers with semaphores.
Because this communication system was destined to practical military use, the transmitted messages were encoded. The messages were kept such secretly, even those who transmit them from tower to tower did not capture their meaning, they just transmitted codes they did not understand. Depending on weather conditions, messages could be sent at a speed of 2880 kms/hr at best.
Forerunners of Chappe's optical network are the
For more information on early communication networks see