Operatig System Tutorial Level3
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Operatig System Tutorial Level3






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  • Prepared By; willye_83@yahoo.com Prepared By; willye_83@yahoo.com

Operatig System Tutorial Level3 Operatig System Tutorial Level3 Presentation Transcript

  • IT-020-3(3) OPERATING SYSTEM CONFIGURATION Prepared By; willye_83@yahoo.com Prepared By; willye_83@yahoo.com
  • What is an Operating System?
    • It has one set of tasks to perform
    • controls the operation of a computer
    • directs the input and output of data
    • keeps track of files
    • controls the processing of computer programs
    • managing the functioning of the computer hardware
    • running the applications programs
    • serving as an interface between the computer and the user
    • and allocating computer resources to various functions
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  • The computer's master control program Prepared By; willye_83@yahoo.com
  • How Operating Systems Work
    • An operating system is the most important software that runs on a computer.
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  • What is software?
    • Software is any set of instructions that performs some task on a computer
    • The operating system performs many essential tasks for your computer.
    • -controls the memory needed for computer processes.
    • -manages disk space.
    • -controls peripheral devices.
    • -and allows you to communicate with the computer.
    • Without an operating system, a computer is useless .
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  • An operating system performs the following functions.
    • User Interface
    • Job Management
    • Task Management
    • Data Management
    • Device Management
    • Security
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  • The Operating System's Job
    • Windows Operating System Loading boot your computer
    VS Prepared By; willye_83@yahoo.com OS Loading Mac OS Loading
  • You know what that means?
    • Booting is the process that occurs when press the power button to turn computer on.
    • The operating system loads.
    • In the points:
    • Controlling the way in which the computer functions
    • Responsible for managing the computer's hardware and software resources .
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  • Vista Desktop
    • big share of the operating system market
    • over 90% of computer users have
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  • Mac OS X Desktop
    • almost 7.5% percent of the operating systems market as of March 2008
    • Mac computers are sleek and modern looking
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  • Desktop Version of Linux
    • Linux is an open source
    • Unlike Windows and Mac OS
    • Linux was started in the 1990s
    • originally created by Linus Torvalds
    • create various versions of the Linux operating system
    • represents under 1% of the market share for home users
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  • Two popular distributions of the software
    • Ubuntu and Red Hat
    • Ubuntu is completely free
    • specifically for home users
    • perfect for laptops, desktops and servers
    • Red Hat is a company
    • offers technical and training support for businesses
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  • You may work on :
    • A Word document
    • print an email
    • And Internet browser open for web surfing
    • These three programs need attention from the (CPU):
    • - To do whatever task that you
    • - The user
    • - Are telling it to do
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    • need memory and storage
    • be able to send messages
    • responsible for handling processor and network management .
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  • Types of Operating Systems
    • Three most common Microsoft Windows, Mac OS X, and Linux Logos Operating systems
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  • Start Menu on Windows
    • User Interface
    • Graphical User Interface (GUI)
    • allows the user to interact with the computer
    • Instead typing a command that tell the computer what to do
    • you can use graphical icons and text on the GUI to instruct the computer to perform a task
    • Operating systems may support optional interfaces
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  • Let's take a look at the graphical user interfaces of three popular operating systems.
    • Microsoft Windows
    • Microsoft created the operating system, Windows, in the mid-1980s. They have a version of the operating system that is designed for the home user, and a professional version, which is intended for businesses. The versions differ in the depth of networking, security, and multimedia support.
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  • Job Management
    • controls the order and time in which programs are run
    • is more sophisticated in the mainframe environment
    • where scheduling the daily work has always been routine
    • job control language (JCL) was developed decades ago
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  • Task Management
    • Multitasking ability to simultaneously execute multiple programs
    • necessary for keeping several applications open at the same time
    • multiple programs can be running at the same time
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  • Data Management
    • keeps track of the data on disk, tape and optical storage devices .
    • application program deals with data by file name and a particular
    • knows where that data are physically stored (which sectors on disk)
    • and interaction between the application and operating system is through the programming interface
    • an application needs to read or write data (API)
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  • Device Management
    • controls peripheral devices
    • requires drivers for the peripherals attached to the computer
    • routine that knows how to deal with each device
    • When a new peripheral is added, device's driver is installed into the operating system
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  • Security
    • provide password protection to keep unauthorized users out of the system
    • maintain activity logs and accounting
    • provide backup and recovery routines
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  • History
    • operating systems were developed in the late 1950s to manage tape storage
    • - (programmers mostly wrote their own I/O routines)
    • In the mid-1960s, operating systems became essential to manage disks
    • - (complex timesharing and multitasking systems)
    • Today, all multi-purpose computers from desktop to mainframe use an operating system. Consumer electronics devices increasingly use an OS.
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  • Common Operating Systems
    • The primary operating systems -Windows (Windows 98, XP, Vista)
    • -Macintosh OS X
    • -Linux
    • -Unix
    • -i5/OS (IBM iSeries)
    • -z/OS (IBM zSeries mainframes)
    • DOS is still used for some applications
    • (special-purpose operating systems)
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  • What is firmware?
    • combination of software and hardware
    • Computer chips that have data or programs recorded on them are firmware
    • Firmware is software that is embedded in a piece of hardware
    • These chips commonly include the following:
    • ROMs (read-only memory)
    • PROMs (programmable read-only memory)
    • EPROMs (erasable programmable read-only memory)
    • - Firmware in PROM or EPROM
    • - firmware upgrade to diskette and flash the BIOS
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  • System and Application Software
    • This diagram shows how the major system software interacts with applications in memory.
    • System software comprises the programs that support the running of applications (operating system, DBMS, TP monitor and access methods).
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  • Prepared By; willye_83@yahoo.com
  • Binary code
    • Code used in digital computers
    • off and on / usually symbolized by 0 and 1
    • A binary code signal is a series of electrical pulses that represent numbers, characters, and operations to be performed
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  • Bit
    • BI nary digi T
    • A binary digit
    • smallest element of computer storage
    • single digit in a binary number (0 or 1)
    • magnetic domain on disk or tape
    • The most common is the byte
    • made up of 8 bits and equivalent to one alphanumeric character
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    • ( BI nary digi T ) The smallest element of computer storage.
    • It is positive or negative magnetic spot on disk and tape and charged cell in memory.
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    • transmitted as a pulse of high or low voltage
    • Speed is increased by making the transistors open and close faster
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  • Software
    • Instructions that tell a computer what to do. Software is the entire set of programs, procedures, and routines associated with the operation of a computer system, including the operating system .
    • The term differentiates these features from hardware , the physical components of a computer system. Two main types of software are system software, which controls a computer's internal functioning, and application software, which directs the computer to execute commands that solve practical problems.
    • A third category is network software, which coordinates communication between computers linked in a network. Software is written by programmers in any number of programming languages .
    • This information, the source code, must then be translated by means of a compiler into machine language , which the computer can understand and act on.
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  • For more information
    • visit Britannica.com. Britannica Concise Encyclopedia. Copyright © 1994-2008 Encyclopædia Britannica, Inc.
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  • The End Prepared By; willye_83@yahoo.com