An operating system, otherwise known as an OS, is the first thing that is loaded onto a computer. It is the heartbeat of the computer and does exactly what it says. It is the system that operates the computer. Without it, a computer is completely defunct.
The majority of personal computers (PCs), whether desktop or laptop, are bought already loaded with Microsoft Windows. Apple Macintosh computers are loaded with Mac OS X. A large number of corporate servers make use of the Linux or UNIX operating systems.
Operating systems are now being used in smaller electronic devices too, such as mobile phones. They have become mini computers that are so strong they have an operating system with several applications. Amazingly, the typical mobile phone today is more powerful than a desktop PC of 20 years ago.
The reason for an operating system is for the control and the organization of hardware and software, allowing the device to operate in a versatile and reliable way.
Operating systems execute basic tasks. For example, when the user types something on the keyboard, it is the operating system that recognizes the input and sends the output to the computer’s display screen. The OS keeps track of the files and directories on the hard drive, and it controls other devices like printers.
The operating system of a large network has much responsibility, as it directs the various programs and users that are all on the network at the same time. It is like a police officer directing the flow of traffic. It also makes sure that illegitimate users do not enter the system.
Operating systems are the software platform for the computer’s applications. These application programs need to be written to run on the specific operating system. The OS that you choose often decides which applications you can or can’t run on your computer.