The Permissive Action Link (PAL) is a security device for nuclear weapons that it is supposed to prevent unauthorized arming or detonation of the nuclear weapon.
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Category Archives: History
World History
When Pigs Fly
When Pigs Fly.
Our Narrow Slice
Animated Maps
America’s Civil War Battlefields.
Radio Free Earth
On Sunday, July 20th, 1969, In the Year 2525 by Zager and Evans was Earth’s number one song. Its cultural influence has just reached Tet UMa.
Computer History
The Computer History Museum offers many online exhibits on a variety of topics related to the history of computing.
Computer History Timeline
Computer Pioneers
Computing Hardware
Illustrated History
Inventors
The Antikythera Mechanism
The Antikythera Mechanism.
Muscle Car Horsepower
How Exaggerated Was It?
30 Years
Back To The Future – Makeup vs. Actual.
