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Ruby on Rails is a framework based on Ruby programming language. It is mainly used for web development. It uses model view controller architecture, which makes easy many aspects when developing the web. The architecture focuses the views on the front end development, the Html, CSS, JS, bootstrap, and preprocessors like SASS and CoffeeScript. The controllers focus on the website’s logic, interacting with views and models, and models focus on data to be stored on the database. The next two commands show how to create a model and a controller.