Mike Cupo, a systems operator for Public Service Electric and Gas Company, uses a special red phone to talk via radio to PSE&G staffers in the field, during a simulated Y2K drill at company headquarters in Newark, N.J., on April 9, 1999. Power plant operators across the country held drills to make sure they could keep electricity flowing if year 2000 computer glitches prevented them from communicating with each other. Mike Derer/AP hide caption
Thom Yorke, the singer of the British band Radiohead performs on the stage of the "Rock en Seine" music festival in 2006. STEPHANE DE SAKUTIN/AFP via Getty Images hide caption
Thom Yorke, the singer of the British band Radiohead performs on the stage of the "Rock en Seine" music festival in 2006. STEPHANE DE SAKUTIN/AFP via Getty Images hide caption
Not all glitches are unintentional and problematic. Glitch art introduces, on purpose, digital typos that would otherwise be edited out in an image. Kevin Wong/Flickr hide caption
Outgoing FBI Executive Assistant Director Shawn Henry. Chip Somodevilla/Getty Images hide caption