Heavy Ion Counter 
Hybrid Integrated Circuit 
hydrophobic interaction chromatography 
Handset Identity Code 
Head Injury Criterion 
Heterogeneous InterConnect 
High Intensity Conflict 
Highest Incoming Channel 
High-integrity container 
High-tech Industries Center 
HIPPARCOS Input Catalog 
Hipparcos Input Catalogue 
Hybrid Integrated Circuits 
Hydrogen-Induced Cracking 
Habitat International Coalition 
handling-induced convulsion 
handling-induced convulsions 
Harding's Image Converter 
Hardware Integration Contractor 
Head Impact Criterion 
Head Injury Criteria 
Headend Interface Converter 
Head-End Interface Converter 
Header Integrity Check 
Headset Interface Cable 
Health Information Center 
Health Insurance Claim 
Health Insurance Commission 
Health Insurance Company 
Health Insurance Council