S - Crest

  • Sigma Phi Gamma

  • Sigma Phi Lambda

  • Sigma Phi Society

  • Sigma Pi (Flag)

  • Sigma Pi (Illinois College)

  • Sigma Rho

  • Sigma Sigma Sigma

  • Sigma Tau Gamma

  • Sigma Tau Nu

  • Sigma Zeta

  • Society of Womens Engineers