Volvo is making an investment in Palo Alto-based Apex.AI, a startup working on developing a robotic operating system qualified for use in production automobiles. Apex.AI, founded by automated systems engineers Jan Becker and Dejan Pangercic, raised $15.5 million in a Series A last November, and revealed that its focus is on developing an enterprise-focused version of the Robot Operating System open-source middleware. Apex.AI currently lists two products on its home page: Apex.OS and Apex.Autonomy.