visual warning system
101Disaster film — Disaster movie redirects here. For the film, see Disaster Movie. A disaster film is a film genre that has an impending or ongoing disaster (such as a damaged airliner, fire, shipwreck, an asteroid collision or natural calamities) as its subject.… …
102Earthquake — For other uses, see Earthquake (disambiguation). Global earthquake epicenters, 1963–1998 …
103Semi Automatic Ground Environment — The Semi Automatic Ground Environment (SAGE) was an automated control system for tracking and intercepting enemy bomber aircraft used by NORAD from the late 1950s into the 1980s. In later versions, the system could automatically direct aircraft… …
104Wigwag (railroad) — This article is about the wigwag railroad crossing signal. For other uses, see Wigwag (disambiguation). A Magnetic Flagman wigwag signal in use in southern Oregon in 2007. Wigwag is the nickname given to a type of railroad grade crossing signal… …
105Emergency vehicle — An emergency vehicle is any vehicle that is designated and authorized to respond to an emergency. These vehicles are usually operated by designated agencies, often part of the government, but also run by charities, non governmental organizations… …
106Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… …
107roads and highways — ▪ transportation Introduction traveled way on which people, animals, or wheeled vehicles move. In modern usage the term road describes a rural, lesser traveled way, while the word street denotes an urban roadway. Highway refers to a major… …
108Air-to-air missile — An air to air missile (AAM) is a guided missile fired from an aircraft for the purpose of destroying another aircraft. It is typically powered by one or more rocket motors, usually solid fuelled but sometimes liquid fuelled. Ramjet engines, as… …
109Carbon monoxide detector — connected to a North American power outlet A carbon monoxide detector or CO detector is a device that detects the presence of the carbon monoxide (CO) gas in order to prevent carbon monoxide poisoning. CO is a colorless and odorless compound… …
110Ground Defense Force! Mao-chan — Mao chan redirects here. For the figure skater often referred to in the Japanese press by that nickname, see Mao Asada. Earth Defender! Mao chan 陸上防衛隊まおちゃん (Ground Defense Force! Mao chan) Genre Comedy, Magical girl …
