| Abbreviation | Definition |
|---|---|
| IPTA | International Palm Therapy Association |
| IPTA | Iowa Physical Therapy Association |
| IPTC | International Press Telecommunications Council |
| IPTW | International Preservation Trades Workshop |
| IPVA | Indiana Professional Viedographers Association |
| IPVA | International Participating Voluntary Agency |
| IPVE | Institute of Poliomyelitis and Viral Encephalitis |
| IPVI | Illinois Parents of the Visually Impaired |
| IQA | Institute of Quality Assurance (U.K.) (subsequently known as The Chartered Quality Institute |
| IRA | Indian Relief Association |
| IRA | International Rifle Association |
| IRAA | International Registry of Artists and Artwork |
| IRB | Institutional Review Board |
| IRC | International Relations Center |
| IRC | International Rescue Committee |
| IRCM | International Regulator of Coaching Mentoring |
| IRCM | International Regulator of Coaching & Mentoring |
| IRDSO | Integrated Rural Development Service Organisation (India) |
| IRF | International Road Federation |
| IRF | Islamic Research Foundation |