This chapter summarises the nature of the information which was available during the period 1450–1650 and describes how it was stored and communicated. The three main methods of storing information were printed books (non–existent prior to the period), handwritten books and documents, and people’s memories. Information could be communicated to other people through reading/writing or the spoken word. An expansion of international travel and trade enabled more people, and printed books, to move between countries, which meant that information could quickly become transferred abroad. This process stimulated the growth of knowledge and scientific co–operation throughout the developed world. As more books became printed in vernacular languages, the knowledge they contained became available to those of the general population who could read, and this in turn stimulated a demand for more widespread education.