HDDI
| Acronym | Definition |
|---|---|
| HDDI | Hierarchical Distributed Dynamic Indexing (computing) |
| HDDI | Hialeah-Dade Development, Inc. (economic development; Florida) |
| HDDI | Host Document Data Interchange |
| HDDI | Hot Diluted Diffusion Ignition (combustion technology) |
| HDDI | Hrvatsko Društvo za Dentalnu Implantologiju (Croatian Society of Dental Implantology) |