| Meaning | Category |
| HSC tracker 2-op FM music file | Computing->File Extensions |
| Hair Straightening Crew | Business->Firms |
| Hardware Systems Command | Governmental->Military |
| Hardware/Software Coordination | Governmental->NASA |
| Harsco Corporation | Business->NYSE Symbols |
| Health Services Command | Governmental->Military |
| Health and Safety Commission | Governmental->Police Medical->Veterinary |
| Hearne Steel Company | Business->Firms |
| Henk's Soundtrack Corner | Business->Firms |
| Hierarchical Storage Controller | Computing->General |
| High Speed Connect | Computing->Telecom |
| High Speed Craft | Governmental->Military |
| Higher School Certificate | Community->Educational |
| Horse Showing Club | Miscellaneous->Hobbies |
| International Workshop on Hardware/Software Co-Design | Academic & Science->IEEE |
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