| HLD | Hailar, Mainland China 
| Others |
| HLD | Haiti Lumiere de Demain
| Others |
| HLD | Hardware Load Balancing Device
| Others |
| HLD | Have a Lovely Day
| Others |
| HLD | Head Load
| Others |
| HLD | Health Leadership Development
| Others |
| HLD | Healthy Life Devices
| Others |
| HLD | Heavy Lifting Device
| Others |
| HLD | Heavy Like Dat
| Others |
| HLD | Heavy-Light Decomposition
| Others |
| HLD | Helium Leak Detection
| Others |
| HLD | Henderson Land Development
| Others |
| HLD | High Level Data
| Others |
| HLD | High Level Design
| Others |
| HLD | High Level Designator
| Others |
| HLD | High Level Dialogue
| Others |
| HLD | High Level Discriminator
| Others |
| HLD | High Level Disinfected
| Others |
| HLD | High Level Disinfection
| Others |
| HLD | High Level Disruption
| Others |
| HLD | High Lumen Density
| Others |
| HLD | High-Level Design
| Others |
| HLD | High-Level Dialogue
| Others |
| HLD | Hollow Limb Design
| Others |
| HLD | Huang Lyuu Dai
| Others |
| HLD | Huang Lyuu Dai lattice algorithm
| Others |
| HLD | Human Lifetable Database
| Others |
| HLD | Humfrey Land Development
| Others |
| HLD | Hyperlipidemia
| Others |
| HLD | Hypersensitivity Lung Disease
| Others |
| HLD | Hyundai Lateral Drift
| Others |