ABCD
ABCD is an abbreviation for:
- ABCD matrices , calculation method in geometric optics, see matrix optics
- ABCD2-Score , also ABCD²-Score, medical scoring system
- ABC Paulista , Large ABC Region (Portuguese: Região do Grande ABC) or ABCD , a Brazilian industrial region
- Advanced Cardiac Life Support , advanced measures during resuscitation, see Advanced Life Support
- ABCD scheme of drug therapy of arterial hypertension : ACE inhibitors / angiotensin receptor blockers , beta blockers , calcium channel blocker and diuretic
- ABCD companies , the four largest companies in the world agricultural trade: Archer Daniels Midland , Bunge , Cargill , Dreyfus
