Omo

site of paleoanthropological excavations along the southern part of the Omo River in southwestern Ethiopia. Hominin (of human lineage) fossils ...
Found on http://www.britannica.com/eb/a-z/o/17

OMO

Open market operation.
Found on http://www-personal.umich.edu/~alandear/glossary/o.html
No exact match found