Do you have any familiarity with open source software? The Linux kernel which is the core of all distributions, also known as "flavors," falls under the GNU public license. It is free software. The word "free" does not refer exclusively to price, but also to freedom- the freedom to modify the source code (program) behind the scenes; hence it carries the name "open source." Linux distributions are the products of many years of work performed by an international community of computer programmers mostly in the C and Python languages. What does this mean for you? If you choose a distribution that's totally free of charge, you will not receive technical support provided by a company as is the case when you purchase Windows that Microsoft supports. Nevertheless, open source software, including free operating systems, are very well supported by hundreds of Linux Users Groups (LUGS), communities, and documentation that's usually written in various languages.