Operating systems distribute processor time and computer memory between processes (running programs) for efficient use of the system. For hardware functions such as I / O and memory allocation, the operating system acts as an intermediary between programs and computer hardware.
Operating systems are on all devices that can be attributed to computers - from cell phones and game consoles to web servers and supercomputers.
Use of operating systems in the world:
In the desktop operating system sector
Microsoft Windows - 82.74 %
MacOS by Apple Inc. - 14.23 %
Linux (and varieties) - 3.03 %
In the mobile sector (smartphones and tablets)
Android - 87.5 %
Apple's iOS with 12.2 %
other operating systems - 0.3 %
OS Linux is dominant in the server and supercomputer sectors.