VCO
# VCO

VCO may refer to:

## Military

* Veterinary Corps Officer, see Veterinary corps (disambiguation)
* Viceroy's commissioned officer, British Indian Army role (1885–1947)

## Technology

* Voltage-controlled oscillator, an electronic device
* Voice Carry Over, a telecommunications relay service
* Akatsuki (spacecraft), or the Venus Climate Orbiter
* Virtual Central Office, in Open Platform for NFV network-function virtualization software

## Other uses

* Voyage Century Online, a nautically themed, free-to-play, massively multiplayer online role-playing game
* Vice Commodore, an elected yacht club committee member
* VCO SA, the joint-stock company, and a distributor of Volcano clothing brand
