After years toiling away in secret on a car project, Apple Inc. Chief Executive Officer Tim Cook has for the first time elaborated on the company's plans in the automotive market. "We're focusing on autonomous systems," Cook said in a June 5 interview on Bloomberg Television that amounted to his most detailed comments yet on Apple's automotive plans. "It's a core technology that we view as very important." He likened the effort to "the mother of all AI projects," saying it's "probably one of the most difficult AI projects to work on." The prospect of self-driving cars has seen a slew of technology companies push into the auto industry, according to McKinsey & Co. Alphabet Inc.'s Waymo unit has signed partnerships with Fiat Chrysler Automobiles NV and Lyft Inc. to develop the technology.