In June 2015, a friend sent Jacky Alciné, a 22-year-old software engineer living in Brooklyn, an internet link for snapshots the friend had posted to the new Google Photos service. Google Photos could analyze snapshots and automatically sort them into digital folders based on what was pictured. One folder might be “dogs,” another “birthday party.”

When Mr. Alciné clicked on the link, he noticed one of the folders was labeled “gorillas.” That made no sense to him, so he opened the folder. He found more than 80 photos he had taken nearly a year earlier of a friend during a concert in nearby Prospect Park. That friend was Black.

He might have let it go if Google had mistakenly tagged just one photo. But 80? He posted a screenshot on Twitter. “Google Photos, y’all,” messed up, he wrote, using much saltier language. “My friend is not a gorilla.”