EMS VCS 3

User's eye view of the "VCS 3"; top left, three main oscillators; bottom left, patch panel; bottom right, joystick. External keyboard not shown.
Note: it has printed logo: "V.C.S. 3".

The VCS 3 (or VCS3; an initialism for Voltage Controlled Studio, version #3) is a portable analogue synthesizer with a flexible modular voice architecture introduced by Electronic Music Studios (EMS) in 1969.

EMS released the product under various names. Logos printed at the console's front left (see photos) say "V.C.S. 3" on the most widely sold version; "The Putney (VCS 3)" on the earlier version; and "The Synthi (VCS 3) II" on the later version "Synthi VCS 3 II".