CSO

Central Services Organization

CSO

Caltech Submillimeter Observatory
Found on http://www.translationdirectory.com/glossaries/glossary142.htm

CSO

acronym: Central Statistical Organization
Found on http://cdiac.ornl.gov/pns/acronyms.html#C

CSO

Also, CISO. A compression method for the ISO image format used as an alternative to the .DAX compression method. It generally has better compression ratios, having 9 levels of compression available. It is primarily used as a way to compress PlayStation Portable (PSP) UMD disks.
Found on http://www.translationdirectory.com/glossaries/glossary339.php

CSO

Civil society organization
Found on http://www-personal.umich.edu/~alandear/glossary/c.html

CSO

Customer Service Office
Found on http://www.translationdirectory.com/glossaries/glossary287.php
No exact match found