The Microsoft Windows operating system is developed and released by a single company. It comes with a minimal set of applications (a calculator, a few games, some networking tools, an Internet browser... etc). Other software can be obtained by users from various sources and installed on the operating system.
"GNU/Linux is different. A GNU/Linux operating system is made of a Linux kernel, a set of GNU tools, an installation program, a package management system and a lot of other software components..."
