| Abbreviation | Definition |
|---|---|
| HLCG | Hard Light Consulting Group |
| HMD | How's My Driving |
| HRCI | Human Resources Consulting Inc |
| HRCS | Human Resources Consulting Services |
| HSC | Health Service Consultant |
| HSCG | Hammer Smith Consulting Group |
| HSCT | Human Services Consulting and Training |
| HTCO | Hany Tawfik Consulting Office |
| IACS | Information Assurance Consulting Services |
| IBC | Illinois Business Consulting |
| IBCP | International Business Consulting Projects |
| IC | Investment Consulting |
| ICC | International Consulting Consortium |
| ICCA | Independent Computer Consultant Association |
| ICCA | Informatics and Computing Consulting Association |
| ICEA | International Consulting Economists Association |
| ICER | IT Consultant Expert Resource |
| ICES | Intelligence Consulting Enterprise Solutions |
| ICLO | International Consultant Law Office |
| ICME | International Consulting Management Engineering |