"FYI" is a common abbreviation of "for your information". The term, originally a wire service abbreviation used by journalists,
Among Internet Standards, FYIs are a subset of the Request for Comments (RFC) series. The FYI series of notes is designed to provide Internet users with a central repository of information about topics related to the Internet. FYI topics may range from historical memos on "why it was done that way" to answers to commonly asked operational questions.