It's a Playstation controller. I got a PSX-to-USB adaptor on clearance.
My old controller had the same number of buttons as a PSX pad, but it was kind of bulky compared to an actual one. Plus one of the right shoulder buttons didn't work and the select button didn't either, so it wasn't at all the same.
I still have it connected to my computer, just in case I have a friend over who wants to play a game on the computer. But the one I'LL use is the Playstation controller.