| CIER | Center for Integrative Environmental Research 
| Others |
| CIER | Center for International Education and Research
| Others |
| CIER | Centre for Indigenous Environmental Resources
| Others |
| CIER | Centre for Integrated Energy Research
| Others |
| CIER | Centre for International Education and Research
| Others |
| CIER | Centre for International Education Research
| Others |
| CIER | China Institute for Employment Research
| Others |
| CIER | Congreso Iberoamericano de Estudios Rurales
| Others |
| CIER | Contemporary Issues in Education Research
| Others |
| CIER | Council-certified Indoor Environmental Remediator
| Others |