Most computers have operating systems, which in essence refers to a system that operates your computer. A computer is so complex that it needs its own system to give it instructions of what to do, when to do it, and how to get it done. Some of the most common manufacturers when it comes to operating systems are the Windows systems, which are developed by Microsoft, and the operating systems created for Macintosh computers by Apple. Finally, there are a family of systems called UNIX which are not developed by any one person, or company, but have been worked on by hundreds of people and entities over many years.
An operating system works via a code which can be changed and modified, rather than by actual physical circuitry. This is a wonderful way of controlling your computer because it means that operating systems can be changed easily and will continue to evolve. When you change something on your desktop computer, such as when your security system needs an update or when you add a new application, your operating system can incorporate these changes rather seamlessly. Once you understand the relative fluidity of your operating system, you can start the process of being able to change some of the ways that it works. This is immensely liberating and satisfying. Think of your OS as a stream that, although it holds a shape, can be, with some work and know how, changed. It flows, but it is also manageable.
Every time you use your PC you are interacting with that PC’s operating system, and you will want to pay attention to the ways in which it allows you to change it and incorporate new information. Also, if you always use a PC, you may want to try using a Mac, just to familiarize yourself with other ways of doing things.