Related Clues:

• P.O. boxes, e.g
• Opposite of yeses
• They're saved on cellphones: Abbr
• House IDs
• Directory info: Abbr
• Certain RSVPs
• Some are natural: Abbr
• Apt. IDs
• They are certainly not positive words
• Us, in Spanish
• Data figs
• CFO's concern
• Arithmetic figs
• Flat refusals
• Disagreeing answers