How to find your Operating System and Service Pack version

From the "Start" button, choose "Settings" -> "Control Panel" -> "System"
and retrieve the OS and SP version from the "General" tab.

How to find your Linux kernel version

Execute the command "cat /proc/version" in an open terminal to obtain the kernel version.

How to find your MacOS version

From the Apple menu, choose "About this Mac" and retrieve the MacOS version.