IBM makes a big shift into cognitive computing

IBM's California research lab sits atop a green hill here, 15 miles south of downtown San Jose. There aren't any signs that suggest if you drive up the narrow road that wraps around the hill you'll find a research facility at the top. No signs that the research center is home to a Fortune 500 company. No signs -- even inside -- that the company once dominated the personal computer industry. After decades in the spotlight as a hardware-centric firm selling PCs, servers and mainframes, the 105-year-old tech giant has made a dramatic shift into a realm that few understand: cognitive computing. Deep within the apps we use, the food we eat, the medicine we take and the medical diagnoses we make, you'll find traces of IBM.