Google Inc unveiled a videoconferencing system for businesses on Thursday, the Internet search companys latest effort generate revenue from corporate customers. Google said it was partnering with Asus, Hewlett-Packard Co and Dell to offer a specialized version of its Chromebox PC that comes with videoconferencing gear, including a video camera and speakers. The first Chromebox for meetings to be available is made by Asus and goes on sale in the U.S. on Thursday for $999, Google said. The product uses Googles free Hangouts video chat technology to connect up to 15 separate video streams from users in different locations.