| filename extensions | art-335 |
| htf | |
| TechTarget file types | art-336 | HTF-HTF-Sounding-File |
| TechTarget file types | art-336 | HTF-Virtual-Hypertext-Font-file |
| TechTarget file types | art-336 | HTF-WebBase-File |
| English | eng-000 | HTF Sounding File |
| English | eng-000 | Virtual Hypertext Font file |
| English | eng-000 | WebBase File |