AT&T Co has formed an in-house venture-capital business to create enterprises based on company technology that has not been fully explored by other AT&T units. AT&T Ventures Corp will initially oversee a string of high-tech organisations dedicated to hardware and software for medical-imaging techniques, computer-code translation and Unix applications. Each AT&T business unit is responsible for technology suited to its particular clients: AT&T Ventures will supplement that effort by exploring applications that stretch beyond those addressable markets, it said.