Explosive Ordnance Reconnaissance. Reconnaissance involving the investigation, detection, location, marking, initial identification, and reporting of suspected unexploded explosive ordnance in order to determine future action.
Found on http://www.encyclo.co.uk/visitor-contributions.php
End of Runway - Although F-16s are inspected prior to leaving the parking space, it is often procedure to reinspect the aircraft in the arm/de-arm area at the end of runway (EOR). Found on http://www.f-16.net/glossary-E.html