There are two mainstream personifications of Windows NT. The first such, NT-tan, usually has purple hair, ranging from lilac to very dark, and blue eyes. She often wears a pink dress (as seen here), and her depicted age can range from child to adult. Sometimes she is also portrayed as the mother of 2K-tan, Inu-T, and, less commonly, other NT releases.
Although usually seen as loving, sweet and motherly, a few artists' depictions show NT-tan as a
The second is Inu-T, a young, blue haired dog-girl who wears a blue dress, and socks and gloves shaped like paws.
Yet another NT-tan, Windows NT SP6, was designed by the dōjinshi group Deja vu, but it was considered a bootleg design by Futaba society and not an official OS-Tan.