CSO
The initialism CSO may mean:
- Central Selling Organization, a De Beers marketing group based in London, and sells about 80% of the world's rough-cut diamonds
- chief strategy officer
- chief security officer
- colour-separation overlay
- combined sewer overflow
- Community Support Officer in the UK
- CSO is used to refer to the Caltech Submillimeter Observatory on Mauna Kea, Hawaii
Categories: Disambiguation