Operating System UNIT - 1 Roadmap • What is an Operating System? • • • • • • • • Operating System Objectives/Functions The Evolution of Operating Systems Major Achievements Structuring methods Design of API’s Interrupts Device Organization User/System state Transition What is an Operating System? • A program that acts as an intermediary between a user of a computer and the computer hardware. OR • A program that controls the execution of application programs. • Kernel – the one program
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OPERATING SYSTEM - FILE SYSTEM http://www.tutorialspoint.com/operating_system/os_file_system.htm Copyright © tutorialspoint.com File A file is a named collection of related information that is recorded on secondary storage such as magnetic disks‚ magnetic tapes and optical disks.In general‚ a file is a sequence of bits‚ bytes‚ lines or records whose meaning is defined by the files creator and user. File Structure File structure is a structure‚ which is according to a required format
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Operating Theatre Operating Theatre Introduction Surgical site infections (SSIs) are the second to third most common site of health care associated infections (HAIs). These complications of surgical procedures cause considerable morbidity and‚ when these occur deep at the site of the procedure‚ can carry mortality as high as 77%. As illustrated below there are several key steps or “chains” that have to be connected to result in infection. However‚ for SSIs‚ the initial introduction of microbial
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To my children‚ Lemar‚ Sivan‚ and Aaron and my Nicolette Avi Silberschatz To my wife‚ Carla‚ and my children‚ Gwen‚ Owen‚ and Maddie Peter Baer Galvin To my wife‚ Pat‚ and our sons‚ Tom and Jay Greg Gagne Abraham Silberschatz is the Sidney J. Weinberg Professor & Chair of Computer Science at Yale University. Prior to joining Yale‚ he was the Vice President of the Information Sciences Research Center at Bell Laboratories. Prior to that‚ he held a chaired professorship in the Department of
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Input/output (I/O) devices). (ii) Operating System (OS) Controls and coordinates the use of the hardware among the various application programs for the various users. (iii) Applications Programs /Application Software Define the ways in which the system resources are used to solve the computing problems of the users (compilers‚ database systems‚ video games‚ business programs). (iv) Users Include people‚ machines‚ and other computers. 1.1 Common operating system platforms include: Windows(NT
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Chapter 2 – Operating System Overview TRUE/FALSE QUESTIONS: 1) An OS should be constructed in such a way as to permit the effective development‚ testing‚ and introduction of new system functions without interfering with service. (True) 2) The OS masks the details of the hardware from the programmer and provides the programmer with a convenient interface for using the system. (True) 3) The ABI gives a program access to the hardware resources and services available in a system through the user
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arises. 2 CRITICAL ANALYSIS OF WINDOW 7 OPERATING SYSTEM Windows 7 is an operating system that was developed by Microsoft Corporation for computers (laptops‚ notebooks‚ home and business desktops PCs); it was released to the public 3 years after the release of Windows Vista operating system. Unlike Vista‚ Windows 7 is stable‚ faster and has more support for hardware. 2.1 MAIN FEATURES OF WINDOWS 7 OPERATING SYSTEM Action Center – This is a central place where we can view
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COMPARISO BETWEEN DIFFERENT TYPES OF OPERATING SYSTEMS These tables provide a comparison of operating systems‚ listing general and technical information for a number of widely used and currently available PC and handheld (including smartphone and tablet computer) operating systems. The article‚ usage share of operating systems provides a broader‚ and more general‚ comparison of operating systems that includes servers‚ mainframes and supercomputers. Because of the large number and variety of
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of guests‚ visitors‚ or strangers‚resorts‚ membership clubs‚ conventions‚ attractions‚ special events‚ and other services for travelers and tourists. The Hotel and Restaurant Management Industry must have Standard Operating Procedures (SOP) to guide them in their day to day business operation. An SOP is a document which describes the regularly recurring operations relevant to the quality of the investigation. The purpose of an SOP is to carry out the operations procedure correctly and to do transactions
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non-human‚ is ethically and morally wrong. Scientists and ethicists alike have debated the implications of human and non-human cloning extensively since 1997 when scientists at the Roslin Institute in Scotland produced Dolly. No direct conclusions have been drawn‚ but compelling arguments state that cloning of both human and non-human species results in harmful physical and psychological effects on both groups. The following issues dealing with cloning and its ethical and moral implications will be addressed:
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