- ZEN stands for Zero Effort NAC (Network Access Control; software)
- ZEN stands for Zona Espansione Nord (Italian: North Expansion Area; neighborhood)
- ZEN stands for Zero Energy Neighborhood
- ZEN stands for Zero Effort Network
- ZEN stands for Zero Engine Noise
- ZEn stands for Zerflainian Enterprizes (Gaithersburg, Maryland)
- ZEN stands for Zoological Education Network Inc. (pet care)
Abbreviations And Their Meaning