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The document discusses the role and functions of an operating system. It notes that an operating system acts as an intermediary between the user and computer hardware. It executes programs, makes the computer convenient to use, and efficiently uses hardware resources. The operating system controls and coordinates how hardware resources like the CPU, memory and I/O devices are used by different applications and users. It can be viewed from the user perspective and system perspective. The operating system manages resources, controls program execution and device operations, and acts as the kernel that always runs.
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This document provides an overview of operating systems, including:
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2. Explanations of different operating system structures like simple, layered, microkernel, and modular approaches and their advantages/disadvantages.
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OS introduction
The document discusses the goals and operations of an operating system. The key goals of an operating system are efficient use of resources, user convenience, and preventing interference between users. The main operations of an operating system are program management, which involves executing and scheduling programs, resource management, which involves allocating and managing memory, CPU, and I/O devices, and security/protection which prevents unauthorized access to programs and data.
Ch1kiit [compatibility mode]
This document provides an introduction and overview of operating systems. It defines an operating system as a program that manages computer hardware resources and provides common services for computer programs. It describes the four main components of a computer system: hardware, operating system, application programs, and users. It also outlines some of the key services an operating system provides, such as program execution, I/O operations, file management, and resource allocation. Finally, it discusses the structure and evolution of modern operating systems from early batch and time-sharing systems to current multiprogramming systems.
Introduction to OS 1.ppt
The document discusses operating systems and their key concepts. It begins by defining an operating system as a program that acts as an intermediary between the user and computer hardware, allocating resources and controlling programs. It then describes the four main components of a computer system - hardware, operating system, application programs, and users. Finally, it outlines different types of operating systems including batch systems, timesharing systems, multiprocessing systems, distributed systems, client/server systems, and real-time embedded systems.
Operating system2.pdf
The document provides an overview of operating systems, including their structure, main functions, and popular examples. It discusses how operating systems control computer resources and provide an interface between hardware and software. The main functions of an operating system include process management, memory management, file management, security, and command interpretation. Popular single-user operating systems include DOS, while multi-user systems include Unix and Windows. In conclusion, operating systems are essential for running applications and enabling work to be done on a computer.
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Os views
- 1. Operating System Concepts Mrs.G.Chandraprabha,M.Sc.,M.Phil., Assistant Professor Department of Information Technology V.V.Vanniaperumal College for Women Virudhunagar
- 2. A program that acts as an intermediary between a user of a computer and the computer hardware. Operating system goals: Execute user programs and make solving user problems easier. Make the computer system convenient to use. Use the computer hardware in an efficient manner. Operating System Concepts
- 3. 1.Hardware – provides basic computing resources (CPU, memory, I/O devices). 2.Operating system – controls and coordinates the use of the hardware among the various application programs for the various users. 3.Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (Word processors, Spreadsheets, compilers, and web browsers etc.,). 4.Users (people, machines and other computers). Operating System Concepts
- 5. Operating system can be explored from two view points. User view System view Operating System Concepts
- 6. Operating System Concepts PC Computer systems->OS is designed for the convenience to all users Main frame systems ->OS is to be an effective utilization of the hardware Handheld systems-> some are connected to networks directly through wireless and more convinience and effective utilization of resources.
- 9. Resource allocator – manages and allocates resources. Control program – controls the execution of user programs and operations of I/O devices Kernel – the one program running at all times (all else being application programs). Operating System Concepts