Computing Fundamentals Unit 5- Operating Systems

Objectives Identify the purpose of an OS Identify different operating systems Describe computer user interaction with multiple operating systems Identify system limitations Describe common problems related to operating systems

The OS System software Allows user & hardware to communicate with application software & reverse Manages files & resources Drivers allow peripherals to communicate with OS Every PC needs one OS responsible for hardware & software resources.

Operating Systems DOS Windows Mac OS Old Text based, single task only Command Prompt Windows 3.0, 3.1, 95, 98, 2000, Me, XP, Vista, 7, 8, 8.1 Mac OS Linux, Unix, Handheld/Tablet OS, Embedded Network OS (NOS) Novell, Windows Server Allows shared access, security

DOS Found in Command Prompt Show on their PC

Windows- Through the Years 3.0, 3.1, 95, 98, 2000, Me, XP, Vista, 7, 8, 10

Mac OS

Linux Similar to Windows/ Mac Free Open to coding/ changes by the user Open Source

UNIX More for servers/programming of devices

Network OS Runs on a central server Controls access Manage network resources Monitor network Maintains security Windows Server 2008, Novell Netware

Handheld/Tablet OS Current: Android, iOS, Windows, Blackberry Older: Palm OS, Symbian

Embedded OS OS used in appliances or special purposes Small & serves single purpose Car, ATM, router, mp3 player, digital picture frames

Review What are programs used by the OS to talk to hardware devices? Driver Which OS’s use a GUI and can multitask? Windows, MAC Which OS is open source? Linux T or F. A computer can not run application software without an OS. True

OS Problems Incompatibility Sharing Files Application software must be compatible with the OS it runs on Office 2011:mac will only run on MAC’s, not Windows Sharing Files Some files can’t be read across OS’s .txt can be; has no formatting (simple text editor) .rtf can be; keeps formatting

OS Problems File corruption Disk crashes OS files can get damaged & cause OS to not run properly or not at all Virus, power failure, bad install Disk crashes Unexpected shut down Reboot or reinstall/fix errors

Boot Up Process POST (verifies hardware) ROM passes boot instructions to RAM OS located on HD, loaded into RAM C: Drive Check Hardware ROM passes boot instructions to RAM Find OS on the Hard Drive Run OS & load into RAM

User Interfaces How you interact with OS Command Line Interface (CLI) DOS Graphical User Interface (GUI) Icons to click

Review Which user interface must you type out commands instead of clicking icons? CLI Where is the OS stored? Hard drive Where does the OS get loaded onto when the computer boots? RAM Which OS is free and allows users/programmers to change coding to improve it? Linux

Review Name a mobile OS. Which type of user interface is Windows? iPhone, Android, Windows Mobile, others Which type of user interface is Windows? GUI What happens first when you turn on your computer? POST, check hardware What part of the computer contains boot instructions? ROM

Computing Fundamentals Unit 5- Operating Systems