https://www.engadget.com/2007-02-27-sony-announces-line-of-digital-media-port-accessories.html
Sony announces line of Digital Media Port accessories
Feb 28, 2007 - While we're not sure if the "Digital Media Port" on Sony's new line of A/V receivers is anything more than a glorified USB port, it looks like it won't be left...
digital media portsonyannounceslineaccessories