Public relations usually is associated with the influencing of public opinion. Therefore it has subsequently been linked with propaganda. Using one of the many definitions of propaganda "... the manipulation of symbols as a means of influencing attitudes on controversial matters" (Harold D. Lasswell), the terms propaganda and PR seem to be easily interchangeable.
Still many authors explicitly distinguish between public relations, advertising and propaganda. Unlike PR, which is often described as objective and extensive information of the public, advertising and propaganda are associated with manipulative activities. Nevertheless to treat public relations and propaganda as equivalents stands in the tradition of PR.
Also institutions like the
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GCHQ is the British Government Communication Headquarters, which is in fact an electronic monitoring centre which intercepts communications using spy satellites, listening devices and code-cracking equipment. The 1994 Intelligence Services Act defines GCHQ's role in the post Cold War world. National security, economic well-being and the prevention and detection of serious crime are its headline interests. It routinely gathers information on drug-dealing, terrorism, and the movement of arms and key resources such as oil, but is also said to be heavily involved in ECHELON. GCHG praises itself to use and design high end technology such as Cray systems, Tandem based storage and high-end workstations, as well as software for Signals Analysis, Complex Data Manipulation, Translation and Transcription.