| HDT | Halo Dream Team 
| Others |
| HDT | Hard Disk Toolkit
| Others |
| HDT | Hardware Description Table
| Others |
| HDT | Hardware Detection Tool
| Others |
| HDT | Haus Der Technik
| Others |
| HDT | Hawaii Daylight Time
| Others |
| HDT | Hawaii Dialogix Telecom
| Others |
| HDT | Hawaiian Daylight Time
| Others |
| HDT | Hazardous Device Team
| Others |
| HDT | Header Dictionary Triples
| Others |
| HDT | Hearthstone Deck Tracker
| Others |
| HDT | Heat Deflection Temperature
| Others |
| HDT | Heat Deflection Temperature2
| Others |
| HDT | Heat Deflection Tolerance
| Others |
| HDT | Heat Distortion Temperature
| Others |
| HDT | Heavy Duty Tire
| Others |
| HDT | Heavy Duty Towing
| Others |
| HDT | Heavy Duty Trailer
| Others |
| HDT | Heavy Duty Truck
| Others |
| HDT | Heavy Duty Trucking
| Others |
| HDT | High and Dry Test
| Others |
| HDT | High and Dry Trunk
| Others |
| HDT | High Definition Technology
| Others |
| HDT | High Density Tape
| Others |
| HDT | High Design Technology
| Others |
| HDT | High Dose Therapy
| Others |
| HDT | High Dynamic Turning
| Others |
| HDT | Higher Degree Term
| Others |
| HDT | Higher Derivative Terms
| Others |
| HDT | Hino Diesel Trucks
| Others |
| HDT | Holden Dealer Team
| Others |
| HDT | Horizontal Drive Transistor
| Others |
| HDT | Host Decoy Trap
| Others |
| HDT | Host Digital Terminal
| Others |
| HDT | Hyper Damping Technology
| Others |
| Hdt. | Herodot
| Others |
| Hdt. | Herodotos
| Others |
| Hdt. | Herodotus
| Others |