N.E. was a pre-War company that installed hologram systems.[1]
Background
Before the Great War, Frederick Sinclair wished to use holograms as a means of defense.[2] The company installed EBE systems in the Sierra Madre's holograms.
Notes
The company is also mentioned in the cut holotape Sinclair: E.B.E. 
Appearances
N.E. is mentioned in the Fallout: New Vegas add-ons Dead Money and Old World Blues.