HHTC
| Acronym | Definition |
|---|---|
| HHTC | Hitachi High-Technologies Canada (Toronto, Canada) |
| HHTC | Haven High Technology College (Boston, Lincolnshire, England, UK) |
| HHTC | Helen Hayes Theatre Company (Nyack, NY) |
| HHTC | Habitat for Humanity of Teller County (Woodland Park, CO) |
| HHTC | Hemel Hempstead Theatre Company (Hertfordshire, UK) |
| HHTC | Honeywell High Technology Center (Minneapolis, Minnesota) |
| HHTC | High Humidity Trach Collar |