| HTTA | Highlands Trout Triangle Association | 高地鳟鱼三角协会 |
| HTTA | Hawaii Technology Trade Association | 夏威夷技术贸易协会 |
| HTTA | Highway and Traffic Technicians Association | 公路和交通技术协会 |
| HTTA | Honda Transverse Twins Association (motorcycle group) | 本田横向双胞胎协会（摩托车团体） |
| HTTA | Houston Table Tennis Association (Texas) | 休斯顿乒乓球协会（德克萨斯州） |
| HTTA | Hellenic Table Tennis Association (Greece) | 希腊乒乓球协会（希腊） |
| HTTA | Hampshire Table Tennis Association (UK) | 汉普郡乒乓球协会（英国） |
| HTTA | Harlow Town Twinning Association (Harlow, Essex UK) | 哈洛镇双胞胎协会（英国埃塞克斯郡哈洛） |
| HTTA | Highways and Transportation Technicians Association (Hong Kong) | 香港公路及运输技术员协会 |
| HTTA | Haryana Table Tennis Association (India) | 哈里亚纳邦乒乓球协会（印度） |
| HTTA | Hawaii Table Tennis Association | 夏威夷乒乓球协会 |
| HTTA | Highlands Trout Triangle Association (South Africa) | 高地鳟鱼三角协会（南非） |
| HTTA | High Technology Trade Association | 高技术贸易协会 |
| HTTA | Half-Time Teaching Assistantship | 半程助教 |
| HTTA | thenoyltrifluoroacetone | 然后酰三氟丙酮 |
| HTTA | Half-Time Teaching Assistantship (India) | 半程助教（印度） |
| HTTA | How to Travel America (website and book) | 如何旅行美国（网站和书籍） |
| HTTA | Header Tag Title All | 标题标签标题全部 |
| HTTA | Holier Than Thou Attitude | 比你更神圣的态度 |
| HTTA | Having Taken Title As (real estate transactions) | 已取得所有权（房地产交易） |
| HTTA | Heat Treatable Tungsten Alloy | 可热处理钨合金 |
| HTTA | Having Taken Title As | 已将标题作为 |