Aris Tentes NYU TITLE: The Unified Theory of Pseudorandomness ABSTRACT: In this survey talk we are going to talk about pseudorandom objects and the relation among them. These objects have the property that they look random, although little or no randomness is used for their construction. These objects are: Error Correcting Codes Samplers Expander graphs Randomness Extractors Pseudorandom Generators Hardness Amplifiers All these objects have been studied separately and each one has his own body of research. However, when viewed appropriately, they turn out to be almost equivalently and can be expressed using a single language. In fact ideas and techniques have been used for further research from one to another. We will also see the differences between these objects and see why when we have an optimal construction of one of them, does not mean that we have an improved construction for all of them.