Aero Ballistic - The science of ballistics  combined with that of aerodynamics and dealing primarily with the motion through the atmosphere of rockets, guided missiles, and other projectiles.
Aero Biology - The study of the dispersion of airborne biological materials, as pollen, spores, microorganisms, or viruses.
Aero Dynamic - The branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium.