| Acronym | Definition |
|---|
| HLA | Human Leukocyte Antigen |
| HLA | High Level Architecture |
| HLA | Handbook of Latin American Studies (database) |
| HLA | Handball Liga Austria (German: Handball League Austria) |
| HLA | Histocompatibility Leukocyte Antigen |
| HLA | Hill Launch Assist |
| HLA | High Level Assessment |
| HLA | Home Location Area |
| HLA | High Level Assembly |
| HLA | Hong Leong Asia (China) |
| HLA | Hillcrest Lutheran Academy (Fergus Falls, MN) |
| HLA | Health Law Association (various locations) |
| HLA | Hydraulic Launch Assist |
| HLA | Health Law Advocates (Boston, MA) |
| HLA | Housing Land Availability (various locations) |
| HLA | Healthy Living Alliance (Missouri) |
| HLA | Harding Lawson Associates |
| HLA | Home Loan Account (mortgages) |
| HLA | Home Loan Applicant (credit) |
| HLA | Hydraulic Lash Adjuster (automotive valve train component) |
| HLA | High Level Algorithm |
| HLA | Honorary Legal Adviser (Citizens Advice Bureau; UK) |
| HLA | Halifax Library Association (Halifax, Nova Scotia, Canada) |
| HLA | High Level Assessment (Cisco) |
| HLA | Horizontal Line Array |
| HLA | Home Location Agent |
| HLA | Helicopter Landing Area |
| HLA | Heated Living Area (real estate) |
| HLA | High Level Approach (CMM) |
| HLA | High Layer Compatibility |
| HLA | Hawaii Lai'ieikawai Association |
| HLA | Heavy Lift Aircraft |
| HLA | High-Level Analog |
| HLA | Higgins Lectureship Award (AISC) |
| HLA | Heat & Limited Ammo (gaming, Mech Warrior) |
| HLA | Heavy Load Assessment |
| HLA | Hyperbaric Lighting Assemblies |
| HLA | Historical Labor Application |
| HLA | High-Level Accelerator |
| HLA | Heat Loss Analysis, Inc. (Alaska) |
| HLA | Hjørring - Løkken - Aabybro (Private Railway Jylland, Denmark) |
| HLA | Higher-Level Agent |
| HLA | High-Loss Area |