Hi. You're a developer, or someone interested in writing some code. A web app even! This is fun. Awesome. We're going to learn about Volt today. Volt is a web framework that allows us to write applications in which the client and server are in a single language and we can easily bind things to be reactive between the two. Reactivity! Woo! It is also powered by Opal so that all of our code can be in Ruby, client and server both!