BPL (Below Poverty Line) and AAY (Antyodaya Anna Yojana) were classifications within India's public distribution system (PDS). BPL identified households below the poverty line eligible for subsidized food grains, while AAY specifically targeted the poorest families with even greater subsidies. These classifications have evolved under the National Food Security Act (NFSA), focusing now on Priority Household (PHH) and Non-Priority Household (NPHH) categories based on updated criteria.