13-09-2017, 03:22 PM
An operating system (OS) is system software that manages the hardware and software resources of the computer and provides common services for computer programs. All computer programs, excluding firmware, require an operating system to operate.
Timesharing operating systems plan tasks for efficient system use and may also include accounting software for allocating processor time, mass storage, printing, and other resources.
For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between the programs and the hardware of the computer, although the application code is usually executed directly by the hardware and frequently makes calls system to an OS function or is interrupted by that. Operating systems are found on many devices that contain a computer - from cell phones and video game consoles to web servers and supercomputers.
The dominant desktop operating system is Microsoft Windows with a market share of around 83.3%. MacOS Apple Inc. ranks second (11.2%), and Linux varieties are collectively in third place (1.55%). In the mobile sector (smartphones and combined tablets), according to data for the third quarter of 2016, Google Android dominates with 87.5 percent and a growth rate of 10.3 percent a year, followed by iOS by Apple with 12.1 per cent and a decrease per year in the market of 5.2 per cent, while other operating systems amounted to only 0.3 per cent. Linux distributions are dominant in the server and supercomputer sectors. There are other specialized classes of operating systems, such as embedded and real-time systems, for many applications.
Timesharing operating systems plan tasks for efficient system use and may also include accounting software for allocating processor time, mass storage, printing, and other resources.
For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between the programs and the hardware of the computer, although the application code is usually executed directly by the hardware and frequently makes calls system to an OS function or is interrupted by that. Operating systems are found on many devices that contain a computer - from cell phones and video game consoles to web servers and supercomputers.
The dominant desktop operating system is Microsoft Windows with a market share of around 83.3%. MacOS Apple Inc. ranks second (11.2%), and Linux varieties are collectively in third place (1.55%). In the mobile sector (smartphones and combined tablets), according to data for the third quarter of 2016, Google Android dominates with 87.5 percent and a growth rate of 10.3 percent a year, followed by iOS by Apple with 12.1 per cent and a decrease per year in the market of 5.2 per cent, while other operating systems amounted to only 0.3 per cent. Linux distributions are dominant in the server and supercomputer sectors. There are other specialized classes of operating systems, such as embedded and real-time systems, for many applications.