Microsoft released the preview version of a software toolkit for building robot applications on Tuesday, pledging to ignite the robot market in the same way it did the PC market some 20 years ago. Enter its Robotics Studio, a package of tools and runtime software that the company will demonstrate Tuesday at the RoboBusiness conference in Pittsburgh, Pa. A technical preview of the software is available now for free download. It is aimed at all types of robot builders, from commercial users to academics and hobbyists.