• Unit 3: The History of Databases

    Databases have existed for centuries: the maintenance of records and data has evolved from engravings to cards to digital storage. The history of databases gives us a view of the evolution of database models and the problems of each model. Each subsequent model was motivated by the limitations of previous models, the availability of new technology, the need to store and retrieve new types of data, or by the need to handle new volumes of data that exceeded the capabilities of current models. In this unit, we will present the four different models of representing data, discussing the different limits of each.

    Completing this unit should take you approximately 3 hours.

    • 3.1: Before Computers

    • 3.2: The Four Revelations