David Renwick, a former Denverite, who now lives in Oregon, has been stranded at the airport in Portland for three hours on his way to San Fransico.

“When I got here they were already making an announcement,” Renwick said. “They said they were having systemwide computer problems affecting everything from reservations to weather reports for pilots, so they said all planes worldwide were grounded.”

At a United gate in Portland, Renwick is stranded with about 80 other people, he said.

A near-repeat of a week ago with US Airways. Airlines with computer problems left and right.