Eir
Eir stands for:
- Eir (mythology) , a Germanic deity
EIR is an abbreviation for:
- Federal Institute for Reactor Research, see Paul Scherrer Institute
- En-route IR: Authorization to fly to instruments during cruise in Europe
- Equipment Identity Register , a facility in the cellular network for registering cellular devices
- East Indian Railway Company , a former railway company in India
EIr is an abbreviation for: