What does API stand for?

What does API mean?

API	Astral Projection Isle Miscellaneous » Unclassified
API	Active Pharmaceutical Ingredient Medical » Hospitals
API	Active Pharmaceutical Ingredient Governmental » FDA
API	Aromatic PolyImide Academic & Science » Chemistry
API	Arnold P Ishnikov Miscellaneous » Unclassified
API	Applcation Program Interface Miscellaneous » Unclassified
API	Alaska Psychiatric Institute Regional » Alaska
API	Asset Priority Index Computing » Software
API	Armor Piercing Incendiary ammunition round Business » Products
API	Aviation Preflight Indoctrination Governmental » Military
API	Athletes Performance Institute Community » Sports
API	As Per Instructions Business » Stock Exchange
API	API Group Business » London Stock Exchange
API	Australian Pharmaceutical Ind Ltd Business » ASX Symbols
API	Asian / Pacific Islander Community » Genealogy