he Society has long paid attention to recording its collections, making them available in a series of ever-widening circles over the course of its history. The custom began with Isaiah Thomas’s documentation of his original gift of books and continued with entries in a donation book. The Society’s history is intertwined with the evolution of cataloging, library arrangement, and the development of bibliography. The Society associated itself with the monumental bibliographies of early Americana produced by Sabin and Evans. Subject bibliographies formed the core of its publications program in the twentieth century. Evans and its successor volumes were the basis for collaboration with Readex Microprint Corporation in the reproduction of texts. As the bicentennial approached, the "electronic turn" included extensive digitization of the collections.