| Abbreviation | Definition |
|---|---|
| IAPCO | International Association of Professional Conference Organisers |
| IAPSC | Investigation of Air Pollution Standing Conference |
| IASYS | International Workshop on Industrial Automation Systems |
| IAUC | Irish American Unity Conference |
| IAWC | IVSA Animal Welfare Conference |
| IBAC | IBA Branding Advertising Conference |
| IBAC | International Balkan Annual Conference |
| IBBC | International Bioenergy and Bioproducts Conference |
| IBBC | International Bioenergy Bioproducts Conference |
| IBBC | International Borneo Business Conference |
| IBC | International Bridge Conference |
| IBCC | International Building Control Conference |
| IBCC | International Business Career Conference |
| IBCE | International Business Conference and Exhibition |
| IBCM | International Biomass Conference Malaysia |
| IBCM | International Brethren Conference on Mission |
| IBCM | International Brethren Conferences on Mission |
| IBCSE | International Bilingual Conference on Sustainable Entrepreneurship |
| IBCW | International Business Conference and Workshop |
| IBDC | International Banknote Designers Conference |