High Frequency Accelerometer 
Harry Fox Agency 
Health For All 
High Functioning Autism 
Hot Flow Anomalies 
Haemophilia Foundation Australia 
Hageman factor 
hair follicle afferent 
Hard Fiber Association 
Hartree-Fock Approximation 
Health Facility Assessment 
Health Funding Authority 
height-for-age 
Helsinki Final Act 
hemifacial atrophy 
Henry Ford Academy 
hepatic falciform artery 
hexafluoroacetone 
hexafluoroacetone trihydrate 
Hierarchical Foreign Agent 
High Field Approximation 
High Flow Alarm 
High-Frequency Amplifier 
High-Frequency Antenna 
high-frequency audiometry 
Hill Farming Allowance 
Holy Family Academy 
Home for Adults 
human factors analysis 
Human Factors Applications, Inc.