About Eso
The European Southern Observatory is an astronomical research organisation.
ESO may also refer to:
Employee stock option (also: executive stock option)
Ether Saga Odyssey, a fantasy massively multiplayer online role-playing game
The Elder Scrolls Online, a fantasy massively multiplayer online role-playing game
Existential second-order logic
ESO (motorcycles)
Eso (town), Orhionmwon, Edo State, Nigeria