Related Clues:

• Dial letters
• Phone button
• Telephone abbr.
• Letters above 0
• 0, on a telephone: Abbr.
• Abbr. above zero
• Abbr. under a zero
• Person who's a zero?: Abbr.
• Phone abbr.
• Phone button letters
• Switchboard worker: Abbr.
• 0 on a phone: Abbr.
• Abbr. accompanying zero
• Abbr. on some dials
• Phone button label