The OS is a program that stands between your computer and all other programs you run on it. It will manage crucial basic tasks such as file management, memory management, process management, input-output management, and controlling peripheral devices.
Windows accessibility and the fact that it comes pre-installed in most personal computers have made this OS the most popular one today. Also the most virus prone OS seeing as it has the highest probability of being used.
MacOS is built on top of a UNIX-like OS, which is why this MacOS shares many common characteristics with GNU/Linux-derived ones
Some of the GNU/Linux distributions are known to be the most secure and stable OSs out there. They're used in key spheres such as banking, finance, government, and military
