EOO
# EOO

EOO may refer to:

* Extent of occurrence, a concept in Occupancy–abundance relationship
* end of object, a type of operator in the computer data interchange format BSON
* Exchange of Options for Options, a kind of Exchange for Related Positions (EFRP) contrasted to an Exchange of futures for physicals
* Église Orthodoxe Occidentale, a group involved in Western Rite Orthodoxy in the Orthodox Church of France
