Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.

It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint (P2MP), or mesh wired or wireless links.

Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as banks, stores, and other areas where security is needed.

Though Videotelephony is seldom called "CCTV" one exception is the use of video in distance education, where it is an important tool.

Security is freedom from, or resilience against, potential harm (or other unwanted coercive change) from external forces.

Beneficiaries (technically referents) of security may be persons and social groups, objects and institutions, ecosystems, and any other entity or phenomenon vulnerable to unwanted change by its environment.

A company, abbreviated as co., is a legal entity made up of an association of people, be they natural, legal, or a mixture of both, for carrying on a commercial or industrial .

Company members share a common purpose, and unite in order to focus their various talents and organize their collectively available skills or resources to achieve specific, declared goals.

Companies take various forms, such as:

Business is the activity of making one's living or making money by producing or buying and selling products (goods and services).

Simply put, it is "any activity or enterprise entered into for profit.

It does not mean it is a company, a corporation, partnership, or have any such formal organization, but it can range from a street peddler to General Motors." The term is also often used colloquially (but not by lawyers or public officials) to refer to a company, but this article will not deal with that sense of the word.

A camera is an optical instrument for recording or capturing images, which may be stored locally, transmitted to another location, or both.

The images may be individual still photographs or sequences of images constituting videos or movies.

The camera is a remote sensing device as it senses subjects without any contact.