| IERS | Industrial Ecology Research Services 
| Others |
| IERS | InfoFrame Elastic Relational Store
| Others |
| IERS | Institute for Educational Research and Service
| Others |
| IERS | Integrated Environmental Restoration Services
| Others |
| IERS | International Earth Rotation and Reference Systems Service
| Others |
| IERS | International Earth Rotation Service
| Others |
| IERS | Internet Emergency Response Services
| Others |