Possible Clues:

• "This might be of interest," in a memo
• Memo heading, maybe
• Initials at the start of a memo
• Memo-opening abbr.
• Just so you know
• Memo's 'by the way'
• Post-it note abbr.
• ''Thought you'd like to know'' letters
• (Just so you know, the famous last notes of the "Simpsons" theme, if played in F major, run diagonally from this corner to the upper right)
• "This might interest you," in memos