We seldom read and see these most commonly-used abbreviations and we just get accustomed to what response we should give or at a first glance we really do not have any idea at all. I hope this simple reminder and lesson will somehow help you out friends and be confident enough to give a reply or comment.
FYI
= For
Your Information - spelled-out
Seen on bulletin boards
of companies, organizations to post updates of all sort.
