Nearly half of U.S. Internet users have built Web pages, posted photos, written comments or otherwise added to the enormous variety of material available online, according to a report released on Sunday.

The Pew Internet and American Life Project found that about 44 percent of the country’s Internet users have created content for others to enjoy online.

Posting photos and allowing others to download music or video files were the most popular activities, the nonprofit research group found. Other users said they posted written material on Web sites or newsgroups, created their own Web sites, or set up “Web cams” to allow others to see live pictures.

While only 2 percent of U.S. Internet users said they had created “blogs,” or online diaries, 11 percent said they read the blogs of others.

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