Character between MS-DOS and 95-tan is a Windows 3.1. The NT-tan and Longhorn are completely unknown designs to me. The XP-tan reminds me of Homeko but I'm not sure if she IS Homeko.
The XP-tan isn't Homeko, it is a gynoid or prototype/early design for XP-tan (Saseko). Homeko's design was later based on Saseko's prototype/early design.
This art was actually based on this: https://www.youtube.com/watch?v=hiKG5bGVRLE I didn't know whenever I should add the tag "Windows XP Horror edition" or not, if the tag shouldn't be there, I'm sorry.
I would say if multiple arts appear referencing the video, it would then be a good idea to add "windows_xp_horror_edition_(video)" as a tag.
