Closed-circuit television

Rarity: Ultra rare

A topic known all over the world: only a few thousand cards.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Invention

Domain

Society

Knowledge cost

6

In collections

Nobody has pulled it yet.

What Wikipedia says

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

Excerpt from the Wikipedia article “Closed-circuit television”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Sanderflight, CC BY-SA 4.0, via Wikimedia Commons.