Post-it note abbr.

• "Just so you know ...," in memo shorthand
• "Just so you know," in a text
• BTW
• Email forwarder's intro
• "Just a heads-up," to a texter
• Corkboard posting letters
• Letters at the top of an interoffice memo
• Header on many a forwarded email
• 'By the way,' on memos

Wikipedia Word definitions in Wikipedia
FYI was an information series seen on the ABC network in the early 1980s. Hosted by Hal Linden (at the time the star of Barney Miller ), the program features answers to questions that many viewers ask, from common questions such as, "What's the leading ...