Sysoon is on StumbleUpon
StumbleUpon is a discovery engine (a form of web search engine) that finds and recommends web content to its users. Its features allow users to discover and rate Web pages, photos, and videos that are personalized to their tastes and interests using peer-sourcing and social-networking principles.
Toolbar versions exist for Firefox, Mozilla Application Suite, Google Chrome and Internet Explorer, but StumbleUpon also works with some independent Mozilla-based browsers. Third-party toolbars have also been created for Opera. It lacks support on Safari
StumbleUpon uses collaborative filtering (an automated process combining human opinions with machine learning of personal preference) to create virtual communities of like-minded Web surfers. Rating Web sites update a personal profile (a blog-style record of rated sites) and generate peer networks of Web surfers linked by common interest. These social networks coordinate the distribution of Web content, so that users "stumble upon" pages explicitly recommended by friends and peers. Giving a site a thumbs up results in the site being placed under the user's "favorites". Furthermore, users have the ability to stumble their personal interests like "History" or "Games".
Users rate a site by giving it a thumbs up, thumbs down selection on the StumbleUpon toolbar, and can optionally leave additional commentary on the site's review page, which also appears on the user's blog. This social content discovery approach automates the "word-of-mouth" referral of peer-approved Web sites and simplifies Web navigation.
Stumblers also have the ability to rate and review each others' blogs and join interest groups, which are community forums for specific topics. Users can post comments in the manner of a discussion board in these groups and post links to Web sites that apply to the specific topic.
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