English abbreviations from hdsd to heart
- HDSD (Hydrogen Defect Shallow Donors)
- HDSL (High-bit-rate Digital Subscriber Line)
- HDT (High Resolution Dipmeter Log)
- HDTC (Humanitarian Demining Training Center)
- HDTV (High-Definition Television)
- HDU (Horizontal Drive Unit)
- HDV (High Definition Video)
- HDW (Heat Declared Winner)
- HDX (Half Duplex)
- HDY (Hat Yai International Airport)
- HE (high-explosive)
- HE/PR (high-explosive practice)
- HEA (Herat Airport)
- HEAA (High-Explosive Anti-Armour)
- HEAB (High-Explosive Air Burst)
- HEAL (Human Education Against Lies)
- HEAO ((telescope) High Energy Astronomical Observatory, a series of X-ray and gamma ray space telescopes)
- HEAP (High-Explosive Armor-Piercing)
- HE-APERS (high-explosive anti-personnel)
- HEAP-T (high-explosive anti-personnel - tracer)
- HEART (Health Education Across Rural Towns)