Silicon Graphics Inc said Knight-Ridder Inc will publish electronic versions of 31 Knight-Ridder newspapers from across the US on the World Wide Web using Silicon Graphics’ WebForce Indy server workstations, which are customized for use in Internet publishing. The San Jose Mercury News was the first of Knight Ridder’s newspapers to go on the Web in January and seven more have gone up since. The group is now putting papers on line at the rate of two per month and foresees eventual use of video, audio and animation on the company’s Web pages using WebForce Indy’s built-in audio and video input and editing capability. In January, it put its Financial unit up for sale, saying that it is exiting the real-time financial news and information business.