Operating Systems

Operating Systems : 

Operating Systems Created by Olexy Romanchenko

Content : 

Content Introduction What is operating system. OS objectives. Layers of computer systems. Services provided by the OS. Evolution of OS. Parts of OS. Overview of some operating systems.

Introduction : 

Introduction Single machine can perform many operations; Applications may compete for the resources of the machines;

What Is Operating System? : 

What Is Operating System? A program that controls the execution of application programs. An interface between applications and hardware.

Operating System Objectives : 

Operating System Objectives Convenience Makes computer more convenient to use; Efficiency Allows computer system resources; Ability to evolve Effective development, testing, and production of new system function;

Layers of computer systems : 

Layers of computer systems

Services Provided by Operating System : 

Services Provided by Operating System Program development Editors and debuggers Program execution Access to I/O devices Controlled access to files System access Error detection Hardware Errors Software Errors OS cannot grant request of application

Evolution of Operating Systems : 

Evolution of Operating Systems OS for batch jobs Program execution required significant preparation of equipment OS was a system to simplify program setup, simplify transition between jobs Users had no interaction with computer during program execution. OS for Interactive Processing Allowed programs to carry on dialogue with user via remote terminals Real-time processing OS for time-sharing To accommodate multiple real-time users, the OS rotates its various jobs in and out of execution via time-sharing By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created

The Operating System Consists Of: : 

The Operating System Consists Of: File manager Device Drivers Memory Manager Scheduler Dispatches

File Manager : 

File Manager Files usually allowed to be grouped in directories or folders. Maintains information about the files that are available on the system

Device Drivers : 

Device Drivers Software to communicate with peripheral devices or controllers Translates general requests into specific steps for that device

Memory Manager : 

Memory Manager Responsible for coordinating the use of the machine’s main memory

Scheduler : 

Scheduler Maintains a record of processes that are present, adds new processes, removes completed processes

Dispatches : 

Dispatches Ensures that processes that are ready to run are actually executed Time is divided into small (50 ms) segments called a time slice When the time slice is over, the dispatcher allows scheduler to update process state for each process, then selects the next process to run

Commercial Operating Systems : 

Commercial Operating Systems Macintosh Operation Systems(Mac OS 7, Mac OS 8, Mac OS 9, Mac OS X, Mac Server OS) Microsoft Operating Systems(Windows 3.1, Windows 95, Windows 98, Windows XP, Windows 7)

Windows 7 : 

Windows 7

Content : 

Content Introducing of Windows 7 Top 10 reasons to use Windows 7 New futures of Windows 7 Comparison with other windows operating systems Windows 7 System Requirements

Introducing : 

Introducing Windows 7 is the latest release of Microsoft Windows, a series of operating systems produced by Microsoft for use on personal computers, including home and business desktops, laptops, netbooks, tablet PCs, and media center PCs. Windows 7 was released to manufacturing on July 22, 2009,and reached general retail availability on October 22, 2009, less than three years after the release of its predecessor, Windows Vista.

Top 10 reasons to use Windows 7 : 

Top 10 reasons to use Windows 7 Get quicker access to all of your stuff Manage open windows more easily Quickly find what you’re looking for Share files and printers among multiple PCs Easily create and share movies Stay entertained effortlessly Connect to networks easily Do more and wait less Don't leave programs behind Offers your PC better protection

Get quicker access to all of your stuff : 

Get quicker access to all of your stuff Pin Jump List

Manage open windows more easily : 

Manage open windows more easily Size and arrange windows by simply dragging their borders to the edges of your screen

Quickly find what you’re looking for : 

Quickly find what you’re looking for Instantly locate and open any file on your PC, from documents to e-mail messages to songs, right from the Start menu just by typing a word or two.

Aero Thumbnails : 

Aero Thumbnails Preview of open windows.

Comparison with other windows operating systems : 

Comparison with other windows operating systems

Windows 7 System Requirements : 

Windows 7 System Requirements If you want to run Windows 7 on your PC, here's what it takes: 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor. 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit). 16 GB available hard disk space (32-bit) or 20 GB (64-bit). DirectX 9 graphics device with WDDM 1.0 or higher driver. Additional requirements to use certain features: Internet access (fees may apply). Depending on resolution, video playback may require additional memory and advanced graphics hardware. Some games and programs might require a graphics card compatible with DirectX 10 or higher for optimal performance. For some Windows Media Center functionality a TV tuner and additional hardware may be required. Windows Touch and Tablet PCs require specific hardware. HomeGroup requires a network and PCs running Windows 7. DVD/CD authoring requires a compatible optical drive. BitLocker requires Trusted Platform Module (TPM) 1.2. BitLocker To Go requires a USB flash drive. Windows XP Mode requires an additional 1 GB of RAM and an additional 15 GB of available hard disk space. Music and sound require audio output.

Mac OS XSnow Leopard : 

Mac OS XSnow Leopard

Content : 

Content Introducing of operating system Included software System Requirements

Introduction : 

Introduction Snow Leopard was publicly unveiled on June 8, 2009 at the Apple Worldwide Developers Conference. On August 28, 2009, it was released worldwide, and was made available for purchase from Apple's website and its retail stores at the price of US$29 for a single-user license.

Included software : 

Included software With this update you can also take some software like: Finder QuickTime X Safari 4 iCal … and many other Also speed and stability of OS was upgraded.

Finder : 

Finder It’s file manager

QuickTime X : 

QuickTime X Multimedia player

Safari 4 : 

Safari 4 Convenient web-browser

iCal : 

iCal Personal Scheduler

System Requirements : 

System Requirements Apple states the following basic Snow Leopard system requirements are: Mac computer with an Intel processor (IA-32). “Yonah" processors such as Core Solo and Core Duo can run only 32-bit applications; later x86-64 architecture processors such as Core 2 Duo will also be able to run 64-bit applications. 1 GB of RAM 5 GB of free disk space DVD drive (also accessible via Remote Disc) or external USB or FireWire DVD drive for installation Additional requirements to use certain features: QuickTime H.264 hardware acceleration support, requires an Nvidia GeForce 9400M, 320M, or GT 330M graphics card OpenGL, requires a supported Nvidia or ATI graphics card Waiting for Mac OS X Lion…(to be continuous)

OS help as : 

OS help as Execute programs Create and edit any documents Communicate with I/O devices Searching for information what we need Make purchases without leaving home Communicate with our friends

Some questions? : 

Some questions?