Annotation service now has a professional version for users who want to mark up PDFs along with normal Web pages. Josh Lowensohn joined CNET in 2006 and now covers Apple. Before that, Josh wrote about ...

Earlier this year, a group of climate scientists were outraged about a Wall Street Journal editorial. In an earlier era, they might have written a letter to the editor, or meekly submitted their ...

We’ve talked about Google SideWiki and other methods for “Writing in the Internet’s Margins”, but what about some of the other web annotation services out there? This post talks about SideWiki, ...

In February the W3C approved recommendations to enable annotation on the web. There is a long lineage of annotation tools that enable readers of the web to write comments that overlay content and ...

Google on Wednesday launched Sidewiki, a Web annotation tool that serves as a comment forum for Web pages. Sidewiki ranks entries according to their relevance, as determined by Google’s own algorithm.

Looking to help jump-start a new era in annotating Web text, leading venture capital firm Andreessen Horowitz today said that it's investing $15 million in RapGenius, a startup that enables such ...

Is a street preacher the right metaphor for every little blog online? UPDATE: Since this story was published, both Genius and Hypothesis have moved to undermine abuse via web annotation using their ...