theodp writes: Back in 2005, a Slashdot commenter pointed out some prior art for Microsoft's badge color-based 'caste' system — Nazi concentration camp badges. Now, Google is taking heat as a terminated Google contractor shines a spotlight on Google's badge color-based 'class' system. According to Andrew Norman Wilson, full-time Googlers sport White Badges, interns are given Green Badges, and contractors wear Red Badges. But what really intrigued Wilson — and ultimately cost him his job — were the ScanOps workers with Yellow Badges who toiled for Google Book Search in Building 3.1459. 'The workers wearing yellow badges,' writes Wilson, 'are not allowed any of the privileges that I was allowed — ride the Google bikes, take the Google luxury limo shuttles home, eat free gourmet Google meals, attend Authors@Google talks and receive free, signed copies of the author's books, or set foot anywhere else on campus except for the building they work in. They also are not given backpacks, mobile devices, thumb drives, or any chance for social interaction with any other Google employees. Most Google employees don’t know about the yellow badge class.' Time for someone to update the official Google Books History?