A VESA standard for eliminating cable clutter on the desktop by combining signals in one cable and using the monitor as a central distribution point.  The EVC cable includes audio, video, parallel printer, Firewire, USB and the VESA Data Display Channel (DDC) and attaches via a 34-pin MicroCross Molex connector.  The concept never caught on.  The connector was later renamed P&D-A.  See 
VESA Plug & Display.
Enhanced Video Connector
Using the monitor as a central distribution point never caught on.  The EVC was designed to eliminate cable clutter and make attaching peripherals easier.  (Image courtesy of Molex, Inc.)