selawikWe’ve been keeping an even closer eye than usual on Microsoft’s trademark filings, in part because the company may be getting close to settling on an official name for the “Project Spartan” browser that will ship with Windows 10.

It doesn’t look like we’ve uncovered the name of the new browser, yet, but we have found a mystery.

Trademark records show that Microsoft has filed four new trademark applications over the past two weeks. Three of them are easy to identify as features of previously announced products, but the orgin of the fourth isn’t obvious, and the company isn’t saying anything about it.

The trademark application, filed on March 30, is “Selawik.” It’s identified in the filing as “computer software for use in displaying and printing digital typeface designs, typographical ornaments and character fonts,” but categorical descriptions in trademark filings don’t always give the most accurate sense for what a product is actually about.

Selawik is a borough in northwest Alaska, and that may be an indirect clue. Microsoft execs have been known to code-name projects after places where they grew up. It’s no coincidence that Microsoft’s HoloLens project was known by code names including “Fortaleza.” The lead exec on the project, Microsoft’s Alex Kipman, is a native of Brazil.

The other three trademark filings made by Microsoft recently were for “Continuum,” a reference to the Windows 10 feature that automatically switches between tablet and desktop mode; and “TouchBack” and “InkBack,” features of the Surface Hub that allow changes made on the large screen display to sync back to the original device that streamed the content.

But for now, Microsoft’s “Selawik” is a mystery. Feel free to speculate in the comments below, and if you actually know something about this, tips are welcome!

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