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History
Semi-Automatic Ground Environment
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The Semi-Automatic Ground Environment (SAGE) was a system of large computers and associated networking equipment that coordinated data from many radar sites and processed it to produce a single unified image of the airspace over a wide area. SAGE directed and controlled the NORAD response to a possible Soviet air attack, operating in this role from the late 1950s into the 1980s. Its enormous computers and huge displays remain a part of cold war lore, and after decommissioning were common props in movies such as Dr. Strangelove and Colossus, and on science fiction TV series such as The Time Tunnel.
The 4-story SAGE blockhouses with 3.5 acres (1.4 ha) of floor space "were hardened [for] overpressures of" 5 psi (34 kPa). A shorter adjoining buildin
The 4-story SAGE blockhouses with 3.5 acres (1.4 ha) of floor space "were hardened [for] overpressures of" 5 psi (34 kPa). A shorter adjoining building (left) had generators below the 4 intake/exhaust structures on the roof. (DC-01 shown)
Whirlwind computer elements: core memory (left) and operator console
Whirlwind computer elements: core memory (left) and operator console
Module from a SAGE
Module from a SAGE
To increase warning time, radar systems called Texas Towers were placed in the Atlantic Ocean using technology similar to Texas-style offshore oil pla
To increase warning time, radar systems called Texas Towers were placed in the Atlantic Ocean using technology similar to Texas-style offshore oil platforms
Computer network
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A computer network is a set of computers sharing resources located on or provided by network nodes. Computers use common communication protocols over digital interconnections to communicate with each other. These interconnections are made up of telecommunication network technologies based on physically wired, optical, and wireless radio-frequency methods that may be arranged in a variety of network topologies.
Network Packet
Network Packet
Fiber-optic cables are used to transmit light from one computer/network node to another.
Fiber-optic cables are used to transmit light from one computer/network node to another.
Computers are very often connected to networks using wireless links.
Computers are very often connected to networks using wireless links.
An ATM network interface in the form of an accessory card. A lot of network interfaces are built-in.
An ATM network interface in the form of an accessory card. A lot of network interfaces are built-in.