Memo-opening letters

• Heads-up letters
• "Here are the facts," briefly
• "Read this if you like"
• Memo-opening abbr
• 'By the way' memo abbr
• Memo-heading inits
• "This might be of interest ...," for short
• Letters atop some memos
• "I thought this'd be helpful" acronym

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 ...