Hardware Abstraction Layer 
Hindustan Aeronautics Limited 
Hindustan Aeronautics Ltd 
Height Above Landing 
Houston Aerospace Language 
Hardwired Array Logic 
Health Advisory Level 
Horizontal Alarm Limit 
Hackers At Large 
Halide 
HALLIBURTON CO. 
Halliburton Company 
Hallmark Channel 
halofantrine 
Halogen 
haloperidol 
haloperidol decanoate 
halothane 
halothane sensitivity 
hand-assisted laparoscopic 
hand-assisted laparoscopy 
Handicapped Assistance Loans 
haploid autosomal length 
Hard Array Logic 
Hardware Abstraction Langugae 
Hardware Adaptation Layer 
Harwell Automated Library 
Hawaiian Airlines 
HAWKINS AREA LIBRARY 
HEART OF AMERICA LIBRARY