OS Operating System.

OS (operating system) or OS (OS) is a program that acts as an intermediary connection between hardware (Hardware), which the software application to receive information from the user again. Will be used to control the display. Operation of the hardware. Software offers online application for transfer and storage hardware. And allocation of system resources (Resources) to be effective.

In general, the operating system. Not only on the computer, but only But in electronic equipment, electronics such as mobile phones of various kinds. PDAs, laptops tablet variety. To regulate the operation of equipment. And interact with users through the application. (Application) Examples of computer operating systems including Windows, Linux, Mac OS, Solaris, Ubuntu operating system using personal mobile phones including Windows Mobile, iOS, Android etc.

Generally divided into three categories.

------ Software OS is a program to control the operation of equipment by the majority OS Software OS because it can be adjusted most easily developed.

------ Firmware OS as part of a computer program that is, micro-programs (Microprogram) resulting from the lowest set of instructions that the system controls the CPU several commands together to develop changed quite difficult to do. and high cost.

------ Hardware OS is the OS built from electronic equipment, electronics. Software OS serves as a part, but because of the hardware. Making revisions difficult and expensive.

Function of the operating system.

--- 1. User interface (User Interface).

------ Because OS is built with the primary purpose is to facilitate the work for users by users do not need to know the hardware. I can work easily, so it must be the user interface functions. In a manner that is easy to use.

--- 2. Control the computer.

------ OS is a medium that connects the user with the hardware, the user does not need to understand the OS and hardware, so it must be to control the operation of hardware. Instead of using them. It contains a variety of routine. Which controls each device type.

--- 3. Allocation of resources in the system.

------ In the work of the computer. Necessary resources to help such as CPU and memory resources, etc. These are limited. It has to be allocated to use for maximum benefit. And make the process more efficient.