| Acronym | Definition |
|---|
| HLCG➣High Level Communications Group |
| HLCG➣High Level Contact Group for Drug Control (US and Mexico) |
| HLCG➣Harvard Laboratory for Computer Graphics |
| HLCG➣Homosexual and Lesbian Community of Greece |
| HLCG➣High Level Consultative Group |
| HLCG➣High Level Coordination Group |
| HLCG➣High Level Coordinating Group |
| HLCG➣Hervé Lavoignat Communication Global |
| HLCG➣Higher Level Core Group (India) |
| HLCG➣Highlander: the Card Game |