E4

The term E4, E4 or E-4

• The European Route 4, which runs through Sweden and Finland
• The European path E4
• The Eclipse IDE 4.0
• Boeing E-4, a flying command post of the U.S. Air Force
• E -4, a standard process in photography to develop Diapositivfilmen
• Channel 4, a British digital TV channel
• E4, a standardized size of envelopes

• Disambiguation
• Abbreviation