| Abbreviation | Definition |
|---|---|
| HBOA | Hierarchical Bayesian Optimization Algorithm |
| HC | Half Circle |
| HC | Hermitian Conjugate |
| HC | High Complexity |
| HC | Horizontal Coefficient |
| HC | Horn Clause |
| HCD | Highest Common Denominator |
| HCF | Highest Common Factor |
| HCF | Hyper Conical Function |
| HCM | Hausdorff Center for Mathematics |
| HCMR | Harvard College Mathematics Review |
| HCP | Homogeneous Cauchy Problem |
| HCV | Hyper Complex Variable |
| HD | Hahnemannian Decimal |
| HD | Hausdorff Dimension |
| HD | Hexagonal Diamond |
| HD | Highest Divisor |
| HD | Hurter Driffield |
| HDOP | Horizontal Dilution Of Precision |
| HDRA | Higher Dimensional Rewriting and Algebra |