Unit 6- Operating Systems

 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

 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

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

 Found in Command Prompt

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

 More for servers/programming of devices

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

 Blackberry, Palm, Android, Windows Mobile

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

 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

 Incompatibility ◦ 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

 File corruption ◦ 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

 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

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

 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

 Name a mobile OS. ◦ 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

Unit 6- Operating Systems