Many publishers already offer special sections of content targeted to narrow groups of readers--think WSJ.com's Law Blog or Wired's Geek Dad site.

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The main page, which Facebook is calling the "front page" to go with its newspaper metaphor, is adding categories so people can look at a more narrow feed of specific types of content as an alternative to the all-in-one view.

CNN: Facebook revamps site, tweaks mobile apps

Once again, please forgive the narrow slant of this email, both in content and geography.

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If you want to limit exposure to any content, either delete it completely or narrow the audience to only those you really want to share it with.

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Those fans can switch to a more narrow feed of just their friends (or music content or photos) that doesn't include brand pages, potentially making it more difficult for companies to reach their followers.

CNN: Facebook revamps site, tweaks mobile apps

In addition to promoting international understanding, the project aims to expand the volume and variety of cultural content on the Internet, provide resources for educators, scholars and general audiences, and narrow the digital divide within and between countries by building capacity in partner countries.

UNESCO: Communication and Information