Summary Box: Apple’s market clout means scrutiny

SCRUTINY: As Apple sets out to define and dominate the markets it created with the iPhone and the iPad, it will likely face antitrust regulators who want to curb its power.

SPECIFIC CASE: The U.S. Justice Department is considering a lawsuit against Apple and five U.S. publishers on allegations they orchestrated a price-fixing scheme on electronic books. The Wall Street Journal broke the news last week.

SIGNIFICANCE: The e-book case demonstrates the market leverage Apple has gained from its system of Internet-connected devices that tie into iTunes, its digital marketplace for mobile applications, books, newspapers, magazines, textbooks, movies and music.