Ruby is a beginner language use in front end and back end web development. Ruby was built by Yukihiro Matsumoto in the 1990’s, it is used to build a web application. Very recently, I build an application using the terminal instead of creating a web. The project I created was a library app, this app allows you to create an account and borrow books from different types of genres. You can return the book after finishing reading it. To launch this app, you need to use a terminal instead of using the website.