| Term | Full Form | Category |
|---|---|---|
| HCDU | ER Nahrungsmittel Ges.MBH and Company KG. | Others |
| HCDU | ER Nahrungsmittel GmBH and KG | Others |
| HCDU | Hack Conflict Detection Utility | Others |
| HCDU | Harvard College Debate Union | Others |
| HCDU | Harvard College Debating Union | Others |
| HCDU | Healthcare Careers Development Unit | Others |
| HCDU | Honorable Consejo Directivo Universitario | Others |
| HCDU | Howard College Debating Union | Others |