| Abbreviation | Definition |
|---|---|
| GPSA | Gas Processors Suppliers Association |
| GR | Gremar |
| GU | Gulton |
| GY | Goodyear |
| H&PS | Health & Public Services |
| HA | Harris |
| HCSSA | Home Construction Services Suppliers Act |
| HE | Heineman |
| HEMSA | Highway Electrical Manufacturers and Suppliers Association |
| HES | Home Entertainment Suppliers |
| HESCO | Hercules Engineering Solutions Consortium |
| HF | Honeywell Florida |
| HFO | Heavy Fuel Oil |
| HH | H. H. Smith |
| HI | Hayes International |
| HK | Hercules Kenvil |
| HKSS | Hong Kong Service Suppliers |
| HO | Hopkins |
| HP | Hercules Powder |
| HS | Hamilton Standard |