It’s well known that Microsoft is working on a dual-screen PC codenamed Centaurus, but could the company also be working on a new project under its Surface division? According to a tweet from the famed Microsoft leaker WalkingCat, that might be a possibility.

"Project S" ?

— WalkingCat (@h0x0d) September 18, 2019

The leaker behind WalkingCat recently discovered a new Microsoft reference to something called “Project S” — we’ve asked how the information was specifically obtained. One might assume this refers to Santorini, a flavor of Microsoft’s rumored CoreOS operating system; WalkingCat thinks otherwise.

In a Twitter reply to the well-respected Microsoft journalist Mary Jo Foley, WalkingCat indicates that he believes Project S refers to something from the Surface division. He supports his claim by mentioning that Santorini is already the code name for a new UI experience — and that Project S “looks to be a device.”

WalkingCat does cast some doubt, but there remains the possibility that Project S is some sort of new Surface hardware. With Microsoft’s October 2 event coming up, and the folding PC already codenamed Surface Centaurus, this could very well indeed be a new Surface product.

Time will tell what “Project S” is; for now, there’s just speculation. Perhaps it’s a new portable speaker, for which patents recently surfaced, or it might be an updated version of the Surface Headphones. There also remains the possibility that it could refer to a Surface-branded accessory, such as a keyboard or mouse.

“Project S” could perhaps even now be under development at Microsoft, or it could just be an old codename for an app or something that was already released. However, it’s important to note that Project S could also refer to something other than the Surface division.

As Microsoft makes gaming consoles and a holographic headset, and sells cloud services, this could be related to one of those segments of the company. It might be for Xbox, Azure, HoloLens, or even a codename for an upcoming or new feature in the Windows 10 operating system. Let’s see what Microsoft reveals when the October event rolls around!