Hastings
Holddown Alignment Support
hydraulic actuation system
Hardened Aircraft Shelter
Health Advisory Service
Hydrogen Actuation System
Hamilton Anxiety Scale
Helium Atom Scattering
Hospital Accreditation Standards
human albumin solution
HA synthase
haemagglutinins
Hale Area Schools
haloacetic acids
Hanford Analytical Services
Hardened Aircraft Shelters
Hardware Authentication Server
HARM As Sensor
Hasbro, Inc.
Hatch Access Structure
Hauptanschluss
Hawick Archeological Society
Heading Altitude System
Heading and Attitude Sensor
Heading and Attitude System
Headteachers Association of Scotland
Health Administration Services
health authorities
health-assessment system
hearing aids