PSA is the name of the company that includes these three French car brands: Peugeot, Citroen, and DS. There is a long history of building cars and racing them in France, so we'll throw in a quick salute to four time Formula 1 champion Alain Prost from France!
Peugeot was founded in 1810, and last sold cars in the US in 1991. You just might see one once in a while, but probably not every day. Somewhere in the NMS blog I remember seeing a Peugeot 308 at a car show in 2015, and then I saw one parked in my neighborhood last year. The car show one I understand, but I think the one near my house was owned by a foreign military officer stationed here in the US.
Citroen is another French auto maker you've maybe heard of, but again, they haven't been sold here for a long time. The company was started in 1915, and has a long history of building cars. In addition to building cars, they also support various racing series in Europe today. See, that's the kind of stuff we need more of today, maybe like if Ford and FIAT and Chevy would all sponsor more racing and auto crossing!
The third auto brand of PSA is newcomer DS, which was just started in 2015. Let's just say they've never sold any cars in North America, so we're not likely to see them any time soon either.