Busy centers
Else clues• Activity centers
• Airline routing centers
• Big airports
• Busy airports
• Centers
• Centers of activity
• Centers of interest for Bush
• City centers
• Cores
• Ethernet devices
• Focal points
• Important airports
• JFK et al.
• Layover cities, often
• Major airports
• Major airports, e.g.
• Meccas
• Metropolitan centers
• Nerve centers
• O'Hare and JFK
• ORD and ATL, e.g.
• Parts of cars with caps
• Places to make connections
• Primary intersections
• Processing centers
• Wheel centers