HAPPY
| Acronym | Definition |
|---|---|
| HAPPY | Help and Protect Prisoners' Youngsters (est. 2004; UK) |
| HAPPY | HIV/AIDS Prevention Promotion Youth |
| HAPPY | Housing Assistance Payments Program Yearly (housing software company in upstate NY) |
| HAPPY | Have A Peak Pleasure Year :-) |
| HAPPY | Heathcote Alliance for Preserving Prosperity and Youth (Waldorf, Maryland) |