IBM is seeking to drive revenue growth by developing practical applications for Watson, its software that wooed the sector five years ago by beating two human champions on "Jeopardy!" The world's largest education company is leveraging IBM's Watson platform as it tries to take college tutoring from campus libraries to the virtual world. Pearson is partnering with Armonk, New York-based International Business Machines Corp. to use the Watson artificial intelligence product as an online tutor for college courseware.