Computing Fundamentals

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

Objectives

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

The OS

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

Operating Systems

Found in Command Prompt

DOS

Windows- Through the Years

Mac OS

Similar to Windows/Mac

Free

Open to coding/ changes by the user

Linux

More for servers/programming of devices

UNIX

Runs on a central server◦ Controls access◦ Manage network resources◦ Monitor network◦ Maintains security

Windows Server 2008, Novell Netware

Network OS

Blackberry, Palm, Android, Windows Mobile

Handheld/Tablet OS

OS used in appliances or special purposes Small & serves single purpose

◦ Car, ATM, router, mp3 player, digital picture frames

Embedded OS

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

Review

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

OS Problems

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

OS Problems

POST (verifies hardware) ROM passes boot instructions to RAM OS located on HD, loaded into RAM

◦ C: Drive

Boot Up Process

Check HardwareROM 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

User Interfaces

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.◦ 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

Review

Computing Fundamentals

Unit 6- Operating Systems