Sigma 6 or Six Sigma may refer to:
- Six Sigma, a concept in business
- 68–95–99.7 rule, a concept in statistics
- G.I. Joe: Sigma 6, a G.I. Joe toy line
- SDS Sigma 6, one of the SDS Sigma series of computers made by Scientific Data Systems
- Pink Floyd, a British rock group originally called Sigma 6
|This disambiguation page lists articles associated with the title Sigma 6.
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