PositiveThe New York Times Book Review... accessible yet sophisticated ... An academic historian blessed with a journalist’s prose, O’Mara focuses less on the actual technology than on the people and policies that ensured its success ... This is one of O’Mara’s strongest narrative threads: the casual misogyny that has defined Silicon Valley from past to present. She manages to bring the few women who did succeed to the forefront, most notably the programmer and entrepreneur Ann Hardy, who battled systemic sexism even as she wrote the code for many of the first computer time-sharing and networking applications built by the company known as Tymshare ... O’Mara toggles deftly between character studies and the larger regulatory and political milieu.