Information architecture is a design discipline concerned with the structural design of shared information environments and with making the complex clear. With roots in pioneer work in the 1960s and 1970s, it achieved worldwide visibility in the early 1990s when the emergence of the Web as the world’s library and the need to make large amounts of data available online required novel, specialized expertise. Since the late 2000s, information architecture has slowly but steadily broadened its purview from that of the single artifact—website or mobile app—to that of the entire structure that supports a product, a service or an experience, and from online-only information spaces to all types of digital and physical environments.