PRISM

PRISM

PRISM is a clandestine mass electronic surveillance data mining program known to have been operated by the United States National Security Agency since 2007. PRISM is a government code name for a data-collection effort known officially by the SIGAD . The Prism program collects stored Internet communications based on demands made to Internet companies such as Google Inc. under Section 702 of the FISA Amendments Act of 2008 to turn over any data that match court-approved search terms. The NSA can use these Prism requests to target communications that were encrypted when they traveled across the Internet backbone, to focus on stored data that ...

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Prism

In geometry, a prism is a polyhedron with an n-sided polygonal base, a translated copy, and n other faces joining corresponding sides of the two bases. All cross-sections parallel to the base faces are the same. Prisms are named for their base, so a prism with a pentagonal base is called a pentagonal prism. The prisms are a subclass of the prismatoids.

The above text is a snippet from Wikipedia: Prism (geometry)
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prism

Noun

  1. A polyhedron with parallel ends of the same size and shape, the other faces being parallelogram-shaped sides.
  2. A transparent block in the shape of a prism (typically with triangular ends), used to split or reflect light.
  3. A crystal in which the faces are parallel to the vertical axis.


The above text is a snippet from Wiktionary: prism
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