The COMPAS (COMputational database of Polycylic Aromatic Systems) project aims at providing structures and properties for ground-state polycyclic aromatic systems. COMPAS-1 focuses on cata-condensed polybenzenoid hydrocarbons (PBHS) with 43k molecules, COMPAS-2 provides 0.5 million cata-condensed poly(hetero)cyclic aromatic molecules and COMPAS-3 explores 40k the peri-condensed polybenzenoid hydrocarbons. All the 3 data sets contain molecules up to 11 rings with properties calculated at xTB level and molecules up to 10 rings at DFT level.