The Tuesday, Feb. 6 article “Quickly Constructed Robots Vie For Title; Design, Dress Award” misstated the number of teams and participants in the Mobile Autonomous System Laboratory competition. There were 16 teams and 55 participants, not 17 teams and 57 participants. Also, all of the robots used cameras, although the sentence “One of robots, Team Thirteen’s “Mr. Whiskers,” was instead programmed to get a sense for and give a visual representation of the playing field using its camera and other equipment, including a gyroscope, and other optical encoders.” may have given the impression that only one robot used a camera.

The headline of a New York Times story in the World & Nation section of the Tuesday, Feb. 6 issue should have reflected the fact that the story was about passengers stranded recently by American Airlines, not Northwest Airlines.