| Acronym | Definition |
|---|
| HHDC➣Hispanic Housing Development Corporation (Chicago, IL) |
| HHDC➣Harbor Hills Day Camp (Mt. Freedom, NJ) |
| HHDC➣Herringbone Half Double Crochet (stitching; clothing) |
| HHDC➣Horizon Housing Development Company (St. Louis, MO) |
| HHDC➣Hart House Debating Club (University of Toronto) |
| HHDC➣Half Hour Data Collection (electricity billing) |
| HHDC➣Heihe Hydropower Development Company |