A reBlog facilitates the process of filtering and republishing relevant content from many RSS feeds. reBloggers subscribe to their favorite feeds, preview the content, and select their favorite posts. These posts are automatically published through their
"A tumblelog (or tlog) is a variation of a blog that favors short-form, mixed-media posts over the longer editorial posts frequently associated with blogging. Common post formats found on tumblelogs include links, photos, quotes, dialogues, and video."
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