| Acronym | Definition |
|---|
| HTM | HyperText Markup (file extension) |
| HTM | Hand To Mouth |
| HTM | harmful-to-minors |
| HTM | Held-to-Maturity |
| HTM | Hi-Tech Manufacturing |
| HTM | High Tide Mark |
| HTM | Hospitality and Tourism Management (various universities) |
| HTM | Honda Transmission Manufacturing (Ohio) |
| HTM | Hotel and Tourism Management (various organizations) |
| HTM | High Times Magazine (est. 1974; cannabis advocacy; New York) |
| HTM | Hold To Maturity |
| HTM | Hardware Transactional Memory |
| HTM | High Thermal Mass (construction materials) |
| HTM | High-Technology Manufacturing (various companies) |
| HTM | Heart of Midlothian (Scottish football club; UK) |
| HTM | Hyper Text Markup Language |
| HTM | Hit Test Message |
| HTM | High-Tech Medicine |
| HTM | Hierarchical Temporal Memory |
| HTM | Homogeneous Transformation Matrix (mathematics) |
| HTM | Haerterei Technische Mitteilungen (German: Hardening Technical Notes; journal) |
| HTM | Hazlo tú mismo (Spanish: do it yourself) |
| HTM | High Temperature Material |
| HTM | Health Technical Memorandum |
| HTM | Heat Transfer Media |
| HTM | Human Task Manager (software) |
| HTM | Haagsche Tramweg-Maatschappij (Tram Corporation of the Hague) |
| HTM | Heavy Trench Mortar (weaponry) |
| HTM | Historical Thinking Matters (educator resource website) |
| HTM | High Traffic Mode (IRCd) |
| HTM | Head Tyrolia Mares (Austria) |
| HTM | Holy Tabernacle Ministries |
| HTM | Helideck Team Member (energy industry fire training) |
| HTM | Hotel Technology Management Limited (UK) |
| HTM | Hyper-G Text Format (Hyper-G) |
| HTM | Hospital Technical Memorandum (Great Britain) |
| HTM | Hockey This Morning (radio show) |
| HTM | HaloTrialMods.org (web forums) |
| HTM | Honorary Toastmaster |
| HTM | Master of Horticultural Therapy (degree) |