PPT-Chapter 2 Operating System Overview

Ninth Edition By William Stallings Operating Systems Internals and Design Principles 2017 Pearson Education Inc Hoboken NJ All rights reserved Operating System A program that controls the execution of application programs. Eighth Edition. By William Stallings. Operating Systems:. Internals and Design Principles. System Access Threats. Intruders . Malicious Software. Programs that exploit vulnerabilities in computing systems. 1. Event-driven programming . Event-driven programming is a programming paradigm in which the flow of the program is determined by. sensor outputs,. user actions (mouse clicks, key presses), or. messages from other programs or threads.. System Software. Learning Objectives. Explain system software and operating systems. Identify operating systems for desktop PCs. Identify operating systems for handheld PCs and larger . computers. Discuss . 1. Event-driven programming . Event-driven programming is a programming paradigm in which the flow of the program is determined by. sensor outputs,. user actions (mouse clicks, key presses), or. messages from other programs or threads.. and File Management. Chapter 4: Operating Systems and File Management. 2. Chapter Contents. Section A: Operating System Basics. Section B: Today’s Operating Systems. Section C: File Basics. Section D: File Management. History and Hardware. 1: Operating Systems Overview. 2. This is the simplest animal with a “brain”. Caenorphabditis elegans. C. elegans.  is one of the simplest organisms with a nervous system. This system comprises 302 neurons the pattern of which has been comprehensively mapped, in what is known as a connectome. . Chapter Objectives. Explain the role of an operating system and list the main operating systems used on today’s computers. Define and describe a user interface and a graphical user interface. Identify the important features of widely used software applications. Chapter Contents. Section A: Operating System Basics. Section B: Today’s Operating Systems. Section C: File Basics. Section D: File Management. Section E: Backup Security. Chapter 4: Operating Systems and File Management. Chapter Contents. Section A: Operating System Basics. Section B: Today’s Operating Systems. Section C: File Basics. Section D: File Management. Section E: Backup Security. Chapter 4: Operating Systems and File Management. Visualizing Technology. Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall. Objectives. Explain what an operating system does.. Compare the most common stand-alone operating systems.. Visualizing Technology. Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall. Objectives. Explain what an operating system does.. Compare the most common stand-alone operating systems.. Chapter 3 Operating Systems Concepts 1 A Computer Model An operating system has to deal with the fact that a computer is made up of a CPU, random access memory (RAM), input/output (I/O) devices, and long-term storage. By: Lecturer . Raoof. . Talal. 1.1 What are the Operating Systems. ?. An . operating system . is a program that manages the computer hardware. It also acts as an intermediary between the computer user and the computer hardware. 2. See Page 397 . for Detailed Objectives. System Software. System software. . consists of the programs that control or maintain the operations of the computer and its devices. Discovering Computers 2012: Chapter 8.