SAN FRANCISCO—Salesforce.com is changing the name of its development platform to Force.com. The moniker is a reference to several themes that have flowed through the company—including at this event—since Salesforce.coms inception nearly nine years ago.

During his keynote address here Sept. 17 on the opening day of his companys Dreamforce user conference, Chairman and CEO Marc Benioff also unveiled the final layer to the companys nascent development platform—Visualforce, a service that lets developers build any user interface for any application.

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