Automated Clearing House 
acetylcholine 
Allis Chalmers 
attempts per circuit per hour 
advanced combat helmet 
air changes per hour 
Associated Channel Header 
Association for Computers and the Huma… 
Attempt Per Circuit Per Hour 
AUTO TECH 
AUTOMATIC CLEARING HOUSE 
acetaldehyde 
adrenal cortical hormone 
Arkansas Children's Hospital 
ACCS Common Hardware 
acethylcholine 
acetycholine 
acetyicholine 
acetylcholine chloride 
acetylcholinergic 
acetylcholinesterase 
achondroplasia 
Acoli 
Acoustic Countermeasures Hardware 
Acrodermatitis continua of Hallopeau 
active chromatin hub 
active chronic hepatitis 
Active Core Height 
actylcholine 
acute cerebral hemorrhage