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ICS 143 - Introduction to Operating Systems
ICS 143 - Introduction to Operating Systems

... ◦ Understand interaction between the hardware and software ◦ Understand basic principles in the design of computer systems  Resource management, security, portability, flexibility ◦ Increasing need for specialized OS  Operating systems for embedded devices such as cell phones, sensors, and actuat ...
Chapter 2 Operating System Overview
Chapter 2 Operating System Overview

... to communicate via RPCs • Provides base for distributed computing ...
Mgt 20600: IT Management
Mgt 20600: IT Management

... Price/Performance gap between laptops and desktops has narrowed considerably Availability of workstation-class laptops for computing intensive tasks like software development and computer-aided design – Laptop reliability has improved ...
LECTURE 33 APPLICATION I/O INTERFACE
LECTURE 33 APPLICATION I/O INTERFACE

...  Memory-mapped (to VM) file access possible - use memory instructions rather than I/O instructions - very efficient (ex: swap space for disk).  Device driver xfr’s blocks at a time - as in paging  DMA transfer is block oriented  Character devices include keyboards, mice, serial ports  Device dr ...
The Operating System The Operating System of the computer is a
The Operating System The Operating System of the computer is a

... Throughout the history of computers, the operating systems have continuously evolved as the needs of the users and the capabilities of the computer system changes. The earliest computers were mainframe that had no form of an operating system. In the first generation of computers, programs were ente ...
System Software and Operating Systems
System Software and Operating Systems

... program the user wants executed  Modern operating systems are multi-tasking in that they execute two or more applications running simultaneously (actually they switch back and forth between the applications)  Older single-tasking operating systems could only do one thing at a time ...
4 - Operating System Basics.ppt
4 - Operating System Basics.ppt

... Computer Administration ...
Operating System Services
Operating System Services

... Security of the system from outsiders requires user authentication, extends to defending external I/O devices from invalid access attempts If a system is to be protected and secure, precautions must be instituted throughout it. A chain is only as strong as its weakest link. ...
Slide 1
Slide 1

... Linux is an operating system developed by Linus Torvalds in 1991 when he was a student at the University of Helsinki in Finland.  Linux was released to the public as open source software; that is, a program whose source code is available to the public and can be modified to improve it or to custom ...
System Software and Operating Systems
System Software and Operating Systems

... program the user wants executed  Modern operating systems are multi-tasking in that they execute two or more applications running simultaneously (actually they switch back and forth between the applications)  Older single-tasking operating systems could only do one thing at a time ...
Lecture_01
Lecture_01

...  Standard for parallel and high performance computing (Beowulf clusters).  Available for most computers, including PDA, supports graphical user interfaces, networking, and has many applications. ...
Word Processors
Word Processors

... communicate with all hardware devices attached to the computer, A device driver are instructions for the OS on how to communicate with each device, In order for a piece of hardware to work properly its own driver needs installing – it also must be the correct version for the operating system you are ...
Operating Systems Course Outline
Operating Systems Course Outline

... Rationale: Operating systems are central to computing activities. An operating system is a program that acts as an intermediary between a user of a computer and the computer hardware. Two primary aims of an operating systems are to manage resources (e.g. CPU time, memory) and to control users and so ...
83-381 Syllabus English
83-381 Syllabus English

... First Semester 2016/17 Weekly hours: 2 lecture + 1 training 1) Course objectives: An operating system is a set of subsystems/programs that manage a computer system composed of hardware and software resources, providing common services/utilities needed to run system and user applications. All compute ...
Presentation: Operating systems
Presentation: Operating systems

... We covered five of the most important things an operating system does. Without looking back, can you recall what they were? ...
BA471 Management Information Systems
BA471 Management Information Systems

...  Compilers convert software (including OS’s) into machine language (0,1) Source Code ...
Linux+ Guide to Linux Certification
Linux+ Guide to Linux Certification

... There is one administrative account that has “all power”. It is called root This account can make changes to the operating system file system, install and upgrade software This account can also delete and change critical system files which can potentially disable the system Linux is literal, and usu ...
CSC 150 UNGRADED QUIZ - Concordia University Wisconsin
CSC 150 UNGRADED QUIZ - Concordia University Wisconsin

...  A. Definition. An operating system is a master control program which controls all the H/W and other software of a computer system.  B. Analogies for an O/S.  “General manager,”  “traffic cop,” “steward,” “shepherd.” ...
Linux Overview
Linux Overview

... • Linux is an open source operating system. • Linux is developed collaboratively. • This spreading of development burden amongst individuals and companies has resulted in a large and efficient ecosystem and unheralded software innovation. • Linux, which began its existence as a server OS and has bec ...
Enhanced Guide to Managing & Maintaining Your PC, 3e
Enhanced Guide to Managing & Maintaining Your PC, 3e

... interfaces so that high-level software can depend on low-level software to manage the hardware for it Applications software depends on the OS to interface with hardware • Instructs hardware directly • Uses BIOS to provide the instructions • Uses device drivers ...
Components of an operating system
Components of an operating system

... Components of an operating system An operating system is a software program that provides an interface between the user and the computer and manages thousands of applications. Most computer systems are sold with an operating system installed. Computers that are designed for individual users are call ...
Review Exercise 2
Review Exercise 2

... (d)Control hardware devices (12)Which of the following statement about IP Address/Port is NOT correct? (a)IP address is the unique identification on a computer that is connecting to the Internet. (b)IP address are the input/output locations of a computer where messages should send in or out. (c)If ...
Operating systems
Operating systems

... application code is usually executed directly by the hardware and frequently makes system calls to an OS function or is interrupted by it. Operating systems are found on many devices that contain a computer – from cellular phones and video game consoles to web servers and supercomputers. The dominan ...
3. Data Communications
3. Data Communications

... 3.3 Network Operating Systems ...
Operating Systems Introduction
Operating Systems Introduction

... usage) of the computer as needed to solve the problem given.  The allocation process should be as fair and efficient as possible. ...
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Mobile operating system

A mobile operating system (or mobile OS) is an operating system for smartphones, tablets, PDAs, or other mobile devices. While computers such as the typical laptop are mobile, the operating systems usually used on them are not considered mobile ones as they were originally designed for bigger stationary desktop computers that historically did not have or need specific ""mobile"" features. This distinction is getting blurred in some newer operating systems that are hybrids made for both uses.Mobile operating systems combine features of a personal computer operating system with other features useful for mobile or handheld use; usually including, and most of the following considered essential in modern mobile systems; a touchscreen, cellular, Bluetooth, Wi-Fi, GPS mobile navigation, camera, video camera, speech recognition, voice recorder, music player, near field communication and infrared blaster.Mobile devices with mobile communications capabilities (e.g. smartphones) contain two mobile operating systems – the main user-facing software platform is supplemented by a second low-level proprietary real-time operating system which operates the radio and other hardware. Research has shown that these low-level systems may contain a range of security vulnerabilities permitting malicious base stations to gain high levels of control over the mobile device.
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