Related Clues:

• 12 doz.
• Dot follower, sometimes
• The "O" in NATO (Abbr.)
• Alternative to .com or .net
• Net alternative
• Edu cousin
• E-mail address suffix
• Ending of some URLs
• Web address ending, perhaps
• U.R.L. ender
• End of some Web addresses
• Pt. of NATO
• Dot follower, perhaps
• Not .edu or .com
• Pt. of 5-Across