Sigma 7

Sigma 7 may refer to:
 * the callsign of the spacecraft used in the 1962 Mercury-Atlas 8 mission
 * the SDS Sigma 7 computer, made by Scientific Data Systems (SDS), later known as Xerox Data Systems (XDS)
 * Sigma Seven, a Japanese company
 * Sigma 7 (video game), 1987 computer game by Durell Software
 * Sigma 7 AC servo drive series from Yaskawa Electric Corporation