| Rank | Abbreviation | Meaning |
|---|
| ***** | IERA | Insensitive Explosive Reactive Armor
| |
| ***** | IERA | Igreja Evangelica Reformada de Angola
| |
| **** | IERA | Institute for ESOH (Environmental, Safety & Occupational Health) Risk Analysis
| |
| **** | IERA | Innovation and Entrepreneurship in Robotics and Automation
| |
| *** | IERA | International Employment Relations Association
| |
| ** | IERA | Idiopathic Enlargement of the Right Atrium
| |
| ** | IERA | International Economic Relief Agency
| |
| ** | IERA | Iranian Educational Research Association
| |
| ** | IERA | Institute for Engineering Research and Applications
| |
| * | IERA | Interrupt Enable Register A
| |
| * | IERA | Iowa Enduro Riders Association
| |
| * | IERA | instrument, electronic, radio and avionics
| |
| * | IERA | Independent Ecological Rating Agency
| |
| * | IERA | Ion Excited x Ray Analysis
| |
| * | IERA | Inland Empire Rental Association
| |
| * | IERA | Israel Educational Research Association
| |
| * | IERA | Ireland Environmental Reporting Awards
| |
| * | IERA | Idaho Energy Resource Authority
| |
| * | IERA | Icelandic Educational Research Association
| |
| * | IERA | Inclusive Equal Rights Amendment
| |
| * | IERA | International Educational Research Associations
| |
| * | IERA | Intelligence Economique Recherches Applications
| |