CHAPTER 9: OPERATING SYSTEMS

OPERATING SYSTEM

• ·         An operating system (OS) is a set of programs containing instructions that work together to coordinate all the activities among computer and mobile device hardware

OPERATING SYSTEM FUNCTION

• ·         Starting Computers and Mobile Devices
• ·     If a computer or mobile device is off, you press a power button to turn it on
• ·         A user interface (UI) controls how you enter data and instructions and how information is displayed on the screen
• ·         With a graphical user interface (GUI), you interact with menus and visual images
• ·         How an operating system handles programs directly affects your productivity

-          Single tasking and multitasking

-          Foreground and background

-          Single user and multiuser

• ·         The operating system determines the order in which tasks are processed
• ·         A driver is a small program that tells the operating system how to communicate with a specific device.
• ·         Plug and play automatically configures new device as you install them.
• ·         Operating systems typically provide a means to establish Internet connections
• ·         Operating systems often provide users with a variety of tools related to managing a computer, its devices, or its programs

-          File manager

-          Search

-          Screen saver

• ·         Automatic update automatically provides new features or corrections to the program

TYPE OF OPERATING SYSTEM

·         Examples:

-          Desktop

-          Server

-          Mobile

DESKTOP OPERATING SYSTEM

• ·         A desktop operating system is a complete operating system that works on desktops, laptops, and some tablets

-          Windows

-          Mac OS

-          UNIX

-          LINUX

• ·         Windows 8 offers these features:

-          Start screen interface with tiles

-          Includes the desktop interface

-          Support for input via touch, mouse, and keyboard

-          Email app, calendar app, and browser included

-          Enhanced security through an antivirus program, firewall, and automatic updates

-          Windows Store offers additional applications for purchase

SERVER OPERATING SYSTEM

·         Examples:

-          Windows Server

-          OS X Server

-          UNIX

-          LINUX

MOBILE OPERATING SYSTEM

• ·         The operating system on mobile devices and many consumer electronics is called a mobile operating system and resides on firmware

-           Android

Android is an open source, Linux-based mobile operating system designed by Google for smartphones and tablets

-          iOS

iOS, developed by Apple, is a proprietary mobile operating system specifically made for Apple’s mobile devices

-          Windows Phone

Windows Phone, developed by Microsoft, is a proprietary mobile operating system that runs on some smartphones