The stacks at Boston Public Library, one of the oldest and largest public library systems in the country. (Aram Boghosian for Boston Public Library)Boston Public Library, one of the oldest and largest public library systems in the country, is launching a project this summer with OpenAI and Harvard Law School to make its trove of historically significant government documents more accessible to the public. A book undergoing the digitization process in a scanner at Boston Public Library. OpenAI is helping Boston Public Library cover such costs as scanning and project management. “ I think this is a really worthwhile partnership out of which we are going to get more accessible collections,” Boston Public Library’s Chapel said.