Have you ever experienced that your printer got stuck at a piece of paper? What if that happened every time you print? This course explains the importance of technical norms to which engineers abide to, so your printer works more smoothly. Imagine that there were no standards. That is not easy, even if you try. The reason is that a lot of standards are very common to us and are with us for ages. But there are also new standards, new technical agreements, that are created rapidly every day. Did you ever ask yourself how under the hood of your mobile phone, messages are sent other phones? Society would not be like it is today, if there were no technical agreements on how things are working. This course explains how these technical specifications help you and society in general.