NEW YORK -- Digg.com, a Web site that ranks and displays news items based on recommendations from its users, is expanding to include video and topics beyond technology.

Currently, users are limited to posting and reading items on security, digital music, robots and other tech-related categories. Beginning Monday, they'll get world, business and entertainment news as well, along with non-news video. Games and science also will break out of the general technology section.

Users also will get more options for sorting and displaying items.

Jay Adelson, chairman and chief executive of Digg Inc., said the site started with technology news because its initial users were interested and savvy in technology. But as the site grew to 300,000 registered users, 10 times as many as a year ago, many tried to post news in other categories anyhow, he said.

"We've been under a lot of pressure from the user base for well over a year to expand to different areas of content," Mr. Adelson said.

Digg is part of a trend in tapping the collective wisdom of a community to uncover items that might otherwise be hard to find. Time Warner Inc.'s AOL is turning its Netscape portal into a site driven primarily by user recommendations, while Yahoo Inc. has introduced user-voted items as part of a redesign.

Digg users who find items they like, or "dig," can submit it to the site by providing the Web address and writing a short title and description. The item stays in a holding bin until enough other users vote in its favor, at which point it bumps up to the front page or to a subsection such as "robots."

Items that don't get enough votes are simply forgotten over time.

With the site's redesign, items will rise the same way, but instead of sorting the popular items by time, users can more easily rank them by popularity or see what's most popular today, this week, this month or this year.

Digg users will be able to customize their pages, eliminating certain categories or subcategories completely.

Users now have the ability to add other users as friends, and with the redesign, they'll be able to see at a glance the stories their friends have supported. They'll also be able to identify items that multiple friends have jointly favored.

According to comScore Media Metrix, Digg.com had 1.3 million users in May, up from 129,000 a year earlier. The site launched in September 2004.