A Wikipedia article on Power engineering reads,
Most refrigerators, air conditioners, pumps and industrial machinery use AC power whereas most computers and digital equipment use DC power.
As far as I know, all digital stuffs require DC power. AC power isn't particularly useful for digital computers, right? What does "most computers and digital equipment use DC power" imply or mean? Does that mean there are computers and other digital electronic gadgets out there which runs on AC power?