Related Clues:

• Letters on a work order, perhaps
• Rush!
• ''Get on it!''
• Memo-opening letters
• ''Rush!''
• Letter abbreviation
• Now, on a memo
• Business-envelope abbr.
• PDQ, in memos
• Sans delay
• "Don't delay!"
• ''Immediately, if not sooner'' letters
• Order ender
• Pronto, on memos
• Env. abbr.