Operating Systems
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The document provides an overview of operating systems and system software. It discusses the basic functions of an operating system including starting and shutting down a computer, coordinating tasks, configuring devices, providing security through user accounts and passwords, and running popular operating systems like Windows, Mac OS X, and Linux. It also describes common utility programs that come with or can be installed on an operating system, such as file managers, search utilities, uninstallers, image viewers, disk defragmenters, firewalls, antivirus software, and media players.
Operating Systems
- 1. Operating Systems Basic Concepts & System Software
- 2. Objectives: Know These Common functions of operating systems Types of operating systems Types and functions of utility programs
- 3. What is an OS? Operating System: set of programs containing instructions that work together to coordinate all the activities among computer hardware resources. In Other Words: It’s what runs your computer. Operating System is to Software what Motherboard is to Hardware
- 4. OS Software Hardware User
- 6. Performance Devices Internet File Management Memory Programs Security User Interface Updates Network Start & Shut Down OS Functions
- 7. Starting & Shutting Down a Computer Shut down options: Power off Sleep mode Hibernating
- 8. GUI vs. Command-line Visual vs. Textual Mouse vs. Keyboard
- 9. Coordinating Tasks Task = (job) an operation the processor manages. Examples: Receiving data Processing instructions Sending information to an output device Transferring items from storage to memory Buffer = place in memory while waiting Spooling (buffer for printing)
- 10. Spooling Queue = order of operations, a line
- 11. Configuring Devices Driver = small program that tells the OS how to communicate with a specific hardware device. Boot loads drivers. Plug & Play = OS automatically configures new devices as you install them.
- 12. Security Log on = access User name or User ID = identity Password = restricting access
- 13. Most Popular Operating Systems
- 14. Types of OS Windows 7, Vista, XP Mac OS X UNIX Linux Coming Soon: Google Chrome Embedded Operating Systems
- 15. Utility Programs System software that allows a user to perform maintenance type tasks. Some are included in OS Others are added over time with software installs.
- 16. File Manager Tasks: Organize files Copying Renaming Deleting Moving Sorting Folder = named location on hard drive
- 17. Search Utility Locates files on your computer Searches by criteria
- 18. Uninstaller Removes installed programs More complete than deleting file
- 19. Image Viewer Graphics files Displays Copies Prints See pictures without opening in an image editor
- 20. Disk Defragmenter Reorganizes files and unused space on hard drive Makes computer run faster
- 21. Firewall Detects and protects computer from intrusions. Monitors connection traffic Internet connection makes you vulnerable to attacks from hackers. Router = hardware firewall The internet is full of viruses. I better use protection!
- 22. Antivirus Programs Virus = harmful program Antivirus = program that finds and removes viruses. Worm = makes copies and uses up your resources shutting your computer down Trojan Horse = hidden file What should I do? Don’t be this guy.
- 23. Media Player View images, animations, listen to music Watch videos Organize files Convert from different formats Download files Burn CDs