An option that allows users to find documents.
Periscope is a smartphone application that allows users to stream live video via their Twitter account.
Napster, the service that allows users to swap digital music files, is a perfect example.
Like BirdGenie, it includes a feature that allows users to act as citizen scientists.
Instagram has introduced a feature that allows users to block abusive or offensive comments on photos.
He envisions an interactive, continually evolving U.S.O.C. Web site that allows users to add content.
Pixlr includes another feature that allows users to modify the colors in a photo.
There is a handy feature, the "Hit List," that allows users to mark restaurants for later.
Previously Mr. Cosulich, 30, founded CommunityWalk, a Web site that allows users to create interactive maps.
The next step will be a feature that allows users to "click to call".
Need-a-Knee is developing an inexpensive leg prosthetic that allows users to sit cross-legged.
