The SDS Sigma 6 computer, made by Scientific Data Systems (SDS), later known as Xerox Data Systems (XDS)
Sigma Chi | Sigma Xi | Sigma Alpha Epsilon | Delta Sigma Theta | Phi Beta Sigma | Sigma Corporation | Sigma Alpha Mu | Sigma Phi Epsilon | Sigma | Kappa Sigma | Beta Gamma Sigma | Tau Beta Sigma | Six Sigma | Sigma Alpha Iota | Phi Sigma Kappa | SK Sigma Olomouc | Sigma SD14 | Sigma Gamma Rho | Phi Sigma Epsilon | Delta Sigma Pi | Sigma Tau Gamma | Sigma Sigma Sigma | Sigma Nu | Sigma Kappa | Phi Kappa Sigma | Lean Six Sigma | Beta Sigma Phi | Alpha Sigma Phi | Alpha Chi Sigma | Team IG-Sigma Sport |