Σσ Sigma is a letter in the Greek language alphabet of Earth, originating in the early period of Human history.

It was used in the following contexts:

Astronomical objects
Star systems
Starfleet terminology
  • Sigma 9 clearance, a top-level security clearance
In the real world, the signma symbol represents teamwork for NASA's mission control team. (Star Trek Encyclopedia (4th ed., vol. 2, p. 92))
Disambig This is a disambiguation page; that is, one that points to other pages that have the same or a similar name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.

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