Invention of Google Scholar

Now ten years old.    Contains 160 million documents. " ... Making the world’s problem solvers 10% more efficient ... Ten years after a Google engineer empowered researchers with Scholar, he can’t bear to leave it  .. " 

" ... Some people have never heard of this service, which treats publications from scholarly and professional journals as a separate corpus and makes it easy to find otherwise elusive information. Others have seen it occasionally when a result pops up on their search activity, and may even know enough to use it for a specific task, like digging into medical journals to gather information on a specific ailment. But for a significant and extremely impactful slice of the population: researchers, scientists, academics, lawyers, and students training in those fields — Scholar is a vital part of online existence, a lifeline to critical information, and an indispensable means of getting their work exposed to those who most need it. ....  "