| Acronym | Definition |
|---|
| IRES | Information and Real Estate Services |
| IRES | Internal Ribosomal Entry Site (biochemistry) |
| IRES | Institute for Resources, Environment and Sustainability |
| IRES | IBM Retail Environment for SUSE |
| IRES | Institut de Reinserció Social |
| IRES | Insurance Regulatory Examiners Society |
| IRES | Institut de Recherches Économiques et Sociales (French) |
| IRES | Intuit Real Estate Solutions |
| IRES | International Real Estate Society |
| IReS | Institut de Recherches Subatomiques (French) |
| IRES | Institute for Research on Environment and Sustainability |
| IRES | International Real Estate Services |
| IRES | Institute of Real Estate Studies |
| IRES | International Relations and European Studies |
| IRES | Imposte sul Reddito delle Società (Italian: Taxes on the Companies Income) |
| IRES | International Research Experience for Students |
| IRES | International Review for Environmental Strategies |
| IRES | Instituto di Ricerche Economiche e Sociali (Italian) |
| IRES | Independent Resource Estimations (South Africa) |
| IRES | International Renewable Energy Storage (Conference) |
| IRES | Internet Reservation Systems |
| IRES | Infra Red Earth Sensor (space/satellite technology) |
| IRES | Inter Regional Executive Search |
| IRES | Integrated Request Entry System |
| IRES | International Research and Educational Society |
| IRES | Infra-Red Experimental Source |
| IRES | Icelandic Resources in Earth Science |
| IRES | International Radiation Education Symposium |
| IRES | Initiative für Regenerative Energien in Sachsen eV (German) |
| IRES | International Research Experience in the Sciences |
| IRES | Isotope Release Simulator |