What is Os-tan?
person1: Xp-tan is a
os-tanshe has really big boobs!
Other person: YOU ARE
A phenomenon started on futaba-channel where people made personifications of the operating systems out there.
Geek1: XP-tan rocks so hard!
Geek2: All of the OS-tan's are so cute~ X3
Geek3: Yeah right.....