Title: Slavs.
Question: Where is the largest Slavic minority located?

Title: Asphalt.
Question: For what reason is asphalt removed from a road?

Title: Alfred North Whitehead.
Question: What did Whitehead state about the belief that a person is exactly the same from moment to moment?

Title: Printed circuit board.
Question:
When did surface-mount become a commonly used manufacturing process?