In 1973, the Centre of Criminology instituted a research programme to examing the private security industry, in response to the rapid growth of the sector. This is one of a series of reports issued by the programme. The report begins with a taxonomy of the security services field, illustrating the range of security systems and organizations and describing their powers and responsibilites. The next section looks at the sources of information available, and how they were used in compiling this report. Sections IV, V, and VI deal with resource allocation to private and public security organizations in terms of employment and expenditures over the last decade, products and markets for purchased security equipment and services, and the social context in which the industry is expanding. Section VII discusses demographic information on private security personnel, including comparisons by province, type of security force and industrial divisions within which they are employed. Section VII summarizes findings.