| Abbreviation | Definition |
|---|---|
| ICRB | Innovative Consumer Research and Business Consulting |
| ICS | Infinity Consulting Solutions |
| ICS | Integrated Consulting Services |
| ICS | Investment Consulting Services |
| IDCG | Insight Development Consulting Group |
| IDCP | International Development Consulting Project |
| IEC | Independent Educational Consultant |
| IECG | Ithaca Education Consulting Group |
| IEPC | International Energy Personnel Consulting |
| IFCE | International Federation of Consulting Engineers |
| IHCA | Irish Hospital Consultants Association |
| IHD | Ian Harris Design |
| IHTC | International High Technologies Consulting |
| IICC | Institutional Investors Consulting Company |
| ILB | Ikhaya Lamava Business |
| IMACON | Innovation Management Consuting |
| IMBC | Infrastructure Management and Built Consultant |
| IMO | Interim Mode of Operation |
| IMS | Internet Marketing Specialist |
| IRSC | International Radiation Safety Consulting |