Sigma Corporation
[af] Sigma (onderneming)
[ar] شركة سيجما
[azb] سیقما قورومو
[cs] Sigma Corporation
[da] Sigma Corporation
[de] Sigma (Unternehmen)
[es] Sigma Corporation
[fa] سیگما کورپوریشن
[fi] Sigma Corporation
[fr] Sigma Corporation