Letters before a heads-up

• Memo letters
• "This might be of interest," on a memo
• "By the way ..."
• "Just so you're aware..."
• "I feel I should tell you," briefly
• Memo abbreviation
• "Just an update" letters
• "Thought I should share," briefly
• Corkboard posting letters

Wikipedia Word definitions in Wikipedia
FYI is a common abbreviation of " for your information ". "FYI" is commonly used in e-mail, instant as on messaging or memo and messages, typically in the message subject, to flag the message as an informational message, with the intent to communicate to ...