Below you can find logos, similar to the sigma.

Ensigma Technologies 190 Ensigma Technologies 190 vector
Sigma 123 Sigma 123 vector
ENSIGMATECHNOLOGIES1 ENSIGMATECHNOLOGIES1 vector
Sigmatel Sigmatel vector
LG Sigma GX-1 LG Sigma GX-1 vector
Raytheon Six Sigma Raytheon Six Sigma vector
ENSIGMATECHNOLOGIES2 ENSIGMATECHNOLOGIES2 vector
Sigma-Aldrich Sigma-Aldrich vector
Sigma SD9 Sigma SD9 vector
Sigma Informatique Sigma Informatique vector
sigma maq coser sigma maq coser vector
Sigma Kappa Ties Sigma Kappa Ties vector
SigmaTron SigmaTron vector
Sixsigma Sixsigma vector
Ensigma Technologies Ensigma Technologies vector