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Computer Hardware Book In Bengali Pdf 18

An operating system acts as an intermediary between the user of a computer and computer hardware. The purpose of an operating system is to provide an environment in which a user can execute programs conveniently and efficiently.

Computer Hardware Book In Bengali Pdf 18


An operating system is a software that manages computer hardware. The hardware must provide appropriate mechanisms to ensure the correct operation of the computer system and to prevent user programs from interfering with the proper operation of the system.

Every general-purpose computer consists of hardware, an operating system(s), system programs, and application programs. The hardware consists of memory, CPU, ALU, I/O devices, peripheral devices, and storage devices. The system program consists of compilers, loaders, editors, OS, etc. The application program consists of business programs, and database programs.

Every computer must have an operating system to run other programs. The operating system coordinates the use of the hardware among the various system programs and application programs for various users. It simply provides an environment within which other programs can do useful work.

System software is a type of computer program that is designed to run a computer's hardware and application programs. If we think of the computer system as a layered model, the system software is the interface between the hardware and user applications. The operating system is the best-known example of system software. The OS manages all the other programs in a computer.

Computer manufacturers usually develop the system software as an integral part of the computer. The primary responsibility of this software is to create an interface between the computer hardware they manufacture and the end user.

The main responsibility of the operating system is to manage a computer's software and hardware resources. It is the computer's main control program. The OS controls and maintains a record of all other programs on the computer, including both application and system software. The OS creates an environment that all other computer programs run within and provides service to those other applications.

Application software and system software are coded differently. System software is written in system programming languages -- such as Executive Systems Problem Oriented Language (ESPOL) -- designed to provide easy access to the underlying computer hardware. Application programs are written in general-purpose languages, such as Pascal, that enable the program to use the same code on different platforms. Some languages, such as C, are used for both system and application software.

GIS is a collection of computer hardware, software, and geographic data for capturing, managing, analyzing, and displaying all forms of geographically referenced information. New Kent County's GIS office creates and maintains spatial information for the creation of maps and data analysis to support county departments and their customers and provides citizens with easy access to this information.

Since the Windows operating system can run on hundreds of different types of computers, variations in hardware configurations within those computers can cause stability problems. There are dozens, if not hundreds, of PC manufacturers and so there is a wide variety in hardware quality of PCs.


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