Networks can be an important part of everything from social organizations to computer systems. Students who pursue studies in network theory generally learn about the principles that underlie these systems as well as relevant real-world applications.

Mexico, officially the United Mexican States, is a federal constitutional republic in North America. Working may require a work visa, which is difficult to get if you want to freelance for a short time. Most of the government-funded universities in major cities (state capital) have short courses on history, gastronomy, and cultural subjects, and most of them are almost free.