1. Computing Fundamentals
Unit 5- Operating Systems

2. 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

3. 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.

4. 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

5. DOS
Found in Command Prompt
Show on their PC

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

7. Mac OS

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

9. UNIX
More for servers/programming of devices

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

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

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

13. 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

14. 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

15. 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

16. 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

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

18. 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

19. 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

20. Computing Fundamentals
Unit 5- Operating Systems