The operating system of any computer can be defined as the set of programs that connect the hardware and software and allow applications to run. Without an operating system, a user cannot run applications with the exception of self booting programs. Operating systems are found in several devices like computers, game consoles, web servers and smartphones. Some of the most popular operating systems that are commonly used in computers and smartphones include Android, Linux, iOS, Windows, UNIX, and Macintosh.
Operating systems can be categorized into several types. Real time operating systems aim at processing multiple applications and executing them in real time. These operating systems are customized with specialized scheduling algorithms to deliver quick and reliable performance.
Multi user and single user operating systems are based on the number of users accessing the same operating system. Operating systems can also be classified as multi tasking and single tasking systems. While most operating systems can multi task, certain OS' are designed to focus on delivering superior performances for specific purposes.
A distributed operating system manages multiple computers like a single entity. These networked computers are linked to allow distributed computing that is carried out in more than one computer.
While Microsoft Windows continues to be the most popular operating system in the world, Mac OS, UNIX and Linux operating systems are more suited for computers with specific purposes. The latest smartphones are also equipped with advanced operating systems like Android, iOS and Windows Phone. The listings on this website offer a variety of services related to operating systems. | 
