Related Clues:

• 'Stat!'
• Envelope abbr.
• Posthaste
• How the boss wants things done, briefly
• 'Immediately!'
• Rush job notation
• Memo starter
• Quickly, in memos
• 'Now!'
• Chop-chop
• On the double
• Without delay
• Memo letters
• Quickly, quickly
• Letters of urgency