What does IAA stand for?

What does IAA mean?

IAA	Indole Acetic Acid Academic & Science » Chemistry
IAA	Internal Accounting Association Business » Accounting
IAA	Imperial Affairs Agency Governmental
IAA	Institute of Actuaries of Australia Business » Professional Organizations
IAA	Internationale Automobil Ausstellung (International Automobile Exhibition) Miscellaneous » Hobbies
IAA	Insurance Application Architecture Computing » Software
IAA	International Aerospace Abstracts Governmental » NASA
IAA	Insurrectional Army of America Miscellaneous » Science Fiction

indoleacetic acid, IAA(noun): a plant hormone promoting elongation of stems and roots