Can you believe that the Internet is about 30 years old. We are going to examine algorithms that changed our world. We will first define what an algorithm is. A few computer labs at William & Mary were connected in the late 80's to the NSFnet (earlier Arpanet, later Internet.) In the mid-90's the campus was wired. You will be asked to help decide the order of the topics: computability, data compression), databases, digital signatures, encryption, error correcting codes, page rank, pattern recognition, and search. I do not expect to cover all of the algorithms.