While Amazon is unlikely to cause a similar problem for Apple, the iPhone maker would be wise to keep a close eye on the dot-com giant.

FORBES: What Apple-Defeating Products will Amazon Unveil on September 6?

Apple would be wise to create a wide-ranging line of cleverly designed peripherals targeted at the millions who already own a Mac.

FORBES: Magazine Article

Still, Google is wise to protect Android, challenged by Apple via a 2010 suit against HTC and another by Microsoft in 2011.

FORBES: Apple Forces Google to Favor Motorola IP Over Android Profits