"What happens when...™" series explains the sequence of events that occur and some of the reasoning behind it. This first book in the series "you press the 'enter' key, de scribes from a software engineer's point of view, the steps in processing a request for a webpage, movie video, email, or photo gallery from the internet. This is book pro vides a concise but detailed explanation of the events from how the keyboard operates, how the operating system processes the keyboard input, how the request is constructed, how the request is routed through the internet, and a quick summary of what happens at the server side. A brief discussion of cybersecurity concerns and a brief discussion of networking is included.