the Aviation Industry Computer-Based Training Committee or AICC (CBT)
Adiabatic isochoric complete combustion, meaning a chemical reaction which proceeds to completion with no heat transfer, in a constant-volume region. This is often used to calculate worst-case overpressure in vessels.
The Akaike information criterion (AIC), a statistic used to measure goodness of fit for a model (especially to prevent overfitting), and its small-sample-size corrected version, the AICc.