"The VCS 3 (or VCS3; an initialism for Voltage Controlled Studio, version #3) is a portable analog synthesiser with a flexible semi-modular voice architecture, by Electronic Music Studios (London) Limited (EMS) in 1969.Note this product was called various names by EMS. For example, the printed logo written to the front left of products are: \u201CV.C.S. 3\u201D or \u201CThe Putney (VCS 3)\u201D on the earlier version, then \u201CThe Synthi (VCS 3) II\u201D on the later version (Synthi VCS 3 II)."@en . . .