# Term Stands For
1 EB Edge Blackening
2 EBD Electron Beam Deposition
3 EBI Electron Beam Lithography
4 EBO Equipment Buy-off
5 ECN Engineering Change Notice
6 ECO Engineering Change Order
7 EIH Equipment In House
8 ERP Enterprise Resource Planning
9 ERS Engineering Request Specification
10 etendue Extent; étendue In French
11 Eye Relief Eye Relief Is The Distance Between The Eyepiece Lens And The Eye That Allows For A Full Field Of View Without Experiencing Vignetting, Blackouts, Or Other Visual Disturbances.