Talk:Toaru Majutsu no Index SS: Kanzaki/@comment-190.18.163.109-20140426055621/@comment-125.60.240.201-20140426090324

It is likely taken from Index atwiki's (basically the Japanese equivalent to this site) naming of it since Project-Index makes no mention of its name other than being a short story by Kamachi.

Here's the name: とある魔術の禁書目録SS 通称『神裂SS』(アニメ『とある科学の超電磁砲』BD&DVD初回特典), which roughly translates as Toaru Majutsu no Index SS aka "Kanzaki SS" (Anime Toaru Kagaku no Railgun BD & DVD first privilege)

Here's the listing for all the Raildex stuff from the atwiki: