Windows is the operating system that runs the software that runs IBM PC compatible computers, laptops and a slightly modified version that runs Windows Phones. Window 8.1 is used for most of the examples in this book. So, Windows is in essence the program that runs your computer. There are other operating systems, UNIX (Linux) also runs on PCs; Apple Mac computers have their own operating system which can also run Windows. Android is an operating system for phones, as is iOS for Apple’s iPhones. But this book is about Windows based PCs, which account for the great majority of PCs.
Windows displays the applications (software) on your device. It also stores all of your files: documents, videos, pictures, music and so ...