Jim and Janet Baker, cofounders of the speech recognition pioneer Dragon Systems, whose technology later became part of Nuance Communications.Janet Baker Microsoftâs nearly $20 billion deal to acquire Nuance Communications, the speech technology giant based in Burlington, feels like the end of a chapter for Bostonâs tech scene. And this particular chapter is a long one â it began 50 years ago, in 1971. That was the year that two grad students, Jim and Janet Baker, met in May, decided what they wanted to do with their lives, and got married in October. âWe wanted to find an...