Related Clues:

• Transmit quickly
• Missive
• -- modem
• Do, for one
• Form of a thank-you
• Marginal jotting
• Pay close attention to
• Short memo
• High C, for one
• Any letter from A to G
• Brief bit of correspondence
• ___ number
• Long-distance copy
• Observe carefully
• It may stick around after the office closes