The document summarizes basic concepts of the internet. It discusses the evolution from Web 1.0, which used only basic text-based browsers, to Web 2.0, which enabled traditional applications to function through the web. It defines the internet as a global system of interconnected computer networks that carries a wide range of information and services, and the world wide web as a set of logically interlinked documents, images and resources referenced by URLs. It also provides a brief overview of C.A.L.L, including what it is, how to use it at work, and its advantages and disadvantages.