Work cat.: Policing and private security, 1983.

LC database, June 5, 1986.

BPI (Security and investigative services)

Adviesraad Internationale Vraagstukken (Netherlands). Employing private military companies, 2007: p. 7 (in practice, the distinction between private security companies, limited to strictly defensive tasks, and private military companies, which focus mainly on more offensive tactics, "is not so clear")

Wikipedia, July 28, 2008: Private security company page (Private security company can refer to : --companies that employ security guards, --Private military companies)

Isenberg, David. Shadow force, 2008: e-CIP galley (Private Military Contractors (PMC) ... "As an industry, or at least, business sector, PMCs have been around for less than twenty years ... there are still no agreements on how to define them ... Rather than being ragtag bands of adventurers, paramilitary forces, or individuals recruited clandestinely by governments to work in specific covert operations, the modern firm is firmly corporate. Instead of organizing clandestinely, they now operate out of office suites, have public affairs staffs and web sites, and offer marketing literature. But while they like to call themselves private security firms, they are clearly quite different from the traditional private security industry which provides watchmen and building security")

Web. 3; Dict. of Business & Econ.; Ntl. Crim. Just. Thesaurus; Livs; Dict. of Crim.

Here are entered works on organizations outside the public sector that provide systems, services, and staff for the protection of persons and property.