| Abbreviation | Definition |
|---|---|
| HLIP | Hawaiian language immersion program |
| HLIS | Home Language Identification Survey |
| HLL | Hispanic Languages and Literatures |
| HLLO | High Level Language Overwriting |
| HLP | Human Language Processing |
| HLQ | Home Language Questionnaire |
| HLSL | High-Level Shading Language |
| HLSS | Humanities, Languages and Social Sciences |
| HLT | Human Language Technologies |
| HLT | Humanising Language Teaching |
| HLTL | Handwriting Lessons Through Literature |
| HLW | How Language Works |
| HMB | Hierarchical Multilanguage Belief |
| HML | Handlebars Merge Language |
| HML | Histoimmunogenetics Markup Language |
| HMSL | Hierarchical Music Specification Language |
| HOH | House Of Hades |
| HOL | Higher Order Language |
| HOO | Heroes Of Olympus |
| HoO | The Heroes of Olympus |