IBM’s cognitive supercomputer, called Watson, famously won Jeopardy two years ago. That was just the beginning. IBM has built six Watsons in the last year, deploying them to do what the system was designed for: Give healthcare professionals fast answers to complex medical questions.

Both the Memorial Sloan-Kettering Cancer Center and WellPoint have gotten themselves a Watson, and have been training them in the last year to apply its learning algorithms and vast computing power to helping patients. Similar to Siri, Watson was designed to give useful answers to natural-language questions. Rather than spitting back a series of links like a traditional search engine, Watson tries to find the single, correct answer to whatever it’s asked.