discipline subheader. Beta Beta Beta, (biology), colors: Blood red and Leaf green Beta Kappa Chi, (natural sciences/mathematics) Chi Beta Phi, (science and mathematics) Chi Epsilon Pi, (meteorology) Gamma Theta Upsilon, (geography) Gamma Sigma Epsilon, (chemistry) Iota Sigma Pi, (chemistry and related fields, women's) Phi Lambda Upsilon, (chemistry) Phi Sigma, (biological sciences) Phi Tau Sigma, (Food Science and Technology) Pi Epsilon, (environmental sciences) Sigma Gamma Epsilon, (geology/Earth sciences), colors: Gold, Blue, and Silver Sigma Lambda Chi, (construction management technology) Sigma Pi Sigma, (physics, astronomy), colors: Forest Green and Ivory Sigma Xi, (Research in Science and Engineering), colors: Blue and Gold Sigma Zeta, (natural sciences/mathematics/computer science) Agriculture Delta Tau Alpha, , (Honor Society of Agriculture) Gamma Sigma Delta, , (Honor Society of Agriculture) colors: Sand and Forest Green Pi Alpha Xi, (horticulture), colors: Nile green and Cerulean blue Xi Sigma Pi, (forestry), colors: Green and Gray Architecture Sigma Lambda Alpha, (landscape architecture), colors: Gold and Green Tau Sigma Delta, (architecture), colors: White and Gold Engineering Within the larger group of STEM disciplines, these societies serve engineering disciplines. Alpha Epsilon, (agricultural/food/biological engineering) Alpha Eta Mu Beta, (biomedical engineering) Alpha Nu Sigma, (nuclear engineering) Alpha Pi Mu, (industrial engineering) Alpha Sigma Mu, (metallurgy/materials engineering) Chi Epsilon, (civil engineering), colors: Purple and White Eta Kappa Nu, (electrical engineering, computer engineering), colors: Navy blue and Scarlet Omega Chi Epsilon, (chemical engineering), colors: Maroon and White Phi Alpha Epsilon, (architectural engineering) Pi Epsilon Tau, (petroleum engineering and related fields) colors: Gold and Black Pi Tau Sigma, (mechanical engineering), colors: Teal and Maroon Rho Beta Epsilon, (robotics), colors: Crimson, Gold, and Black Sigma Gamma Tau, (aerospace engineering) Tau Alpha Pi, (engineering technology) Tau Beta Pi, (engineering, all types), colors: Brown and White Upsilon Pi Epsilon, (computer science/computer engineering) Health sciences This section includes all healthcare-related fields, including veterinary science. Alpha Epsilon Delta, (pre-medical), colors: Red and Violet Alpha Eta, (allied health professions) Alpha Omega Alpha, (medical students and physicians), Forest Green, Gold and White Beta Sigma Kappa, (Optometry) Delta Omega, (public health) Iota Tau Alpha, (Athletic Training) Nu Rho Psi, (Neuroscience) Omicron Kappa Upsilon, (Dentistry) Phi Zeta, (veterinary medicine) Pi Delta, (podiatry) Pi Theta Epsilon, (occupational therapy) Rho Chi, (pharmacy), colors: Purple and White Sigma Theta Tau, (nursing), colors: Orchid and White Sigma Phi Alpha, (dental hygiene) Sigma Phi Omega, , (Gerontology) Sigma Sigma Phi, (osteopathic medicine) or (medicine) Tau Upsilon Alpha, (human services) Upsilon Phi Delta, (health