Related Clues:

• PC pop-ups
• They may blink on websites
• Spots on the air
• They may pop up while you browse
• They can be personal
• Web-site pop-ups
• Billboards, e.g.
• Some teasers
• Sun spots in Baltimore?
• Word with want or personal
• Show interrupters
• Most junk mail
• Money's money source
• Surfer's stops
• Places to build