Amazon Web Services is a hidden jewel inside Amazon, but very little information is provided to investors to assess its financial success.

FORBES: Amazon Overvalued: Lack of Visibility

The site requires some due diligence, ferreting out hidden costs such as cleaning services, and navigating through real estate hyperbole, where "charming" is code for inconvenient.

CNN: Staying in a stranger's home: A field test

That Samsung looks determined to make the Android platform and Google vanish from users' view, hidden under its own branding and services.

BBC: Samsung's New Galaxy - goodbye Google?