E4
The term E4 , E4 or E4 referred
- the European route 4 , which runs through Sweden and Finland
- the European long-distance path E4
- the IDE Eclipse 4.0
- Boeing E-4 , a US Air Force airborne command post
- E-4 , a standardized process in analog photography for developing slide films
- Channel 4 , a UK digital television station
- E4, a standardized size for envelopes
- a Sony smartphone, the Sony Xperia E4
