OS-tan - WikipediaSome of this article's listed sources may not be reliable. Please help improve this article by looking for better, more reliable sources. Unreliable citations may be challenged and removed. (November 2023) (Learn how and when to remove this message) Box art of Windows 8.1 Pro DSP Memorial Pack with a group of OS-tans from left to right: Claudia (Microsoft Azure), Yuu and Ai (Windows 8.1), and Nana
