What does HHA stand for?

Anderson - H. H. Line - Steamship (MHDB)

Half-Hardy Annual - Horticulture (ROG)

Hatton Heritage Association (EA)

Health Hazard Appraisal (STED)

Health Hazard Assessment - Army

Hereditary Hemolytic Anemia - Medicine

Hexahydric Alcohol (SAUS)

Hickory Handle Association (EA)

High Hardness Armor - Military

High High Alarm (ECII)

Historic House Association - British

Home Health Agency

Home Health Aid (DAVI)

Hungarian Horse Association (EA)

Hydro Home Appliances Ltd. - Formerly, Hemgold Resources Ltd. - Vancouver Stock Exchange symbol

Hypothalamo-Hypophyseal-Adrenal - Endocrinology

Hypovision Hydrospace Operations, Alta Loma, CA - Manufacturer code for watercraft hull identification number (USCG)