Other
- ZENON Environmental, manufacturer and system integrator of hollow fiber membrane technologies and complementary products
- Zenon: Girl of the 21st Century, a children's science fiction novel
- Zenon: Girl of the 21st Century (film), the movie adaptation of the above novel
- Zenon: The Zequel
- Zenon: Z3
- Zeno, ancient name for the village of Akköse
- Zeno (crater), a lunar impact crater, named for Zeno of Citium
- Zeno (programming language), an imperative procedural programming language designed to be easy to learn and user friendly
- Zeno-Watch Basel, a Swiss clockmaker company specialised in aviation watches
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