Disco is a European Dictionary of Skills and Competences. It is kind of like a book that is full of lists of tasks and abilities that people have. For example, it could list someone's cooking skills, their ability to speak a certain language, or their knowledge of computers. The lists help people like employers understand what someone is good at, so they can decide if the person is the right fit for a job or job training. Disco is especially helpful for people who want to go to another country to find a job, because it gives employers a way to understand what a person can do.