No, not a misspelling. It’s retro t-shirts from Microsoft.
I’m not kidding.
Would I wear the "THE DOS TANGLE" tee (pictured right) if I could get it?
You’re darned right I would. I should bug the boss to buy me one for Christmas should it be available.
Check out the official site here.
[Source: Geekologie]

I wouldn’t wear it, it’s bad enough I occasionally wear my OS/2 Warp one…