Operating System (OS)

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1 Computer Software and its Uses Software - programs and data that direct a computer to accomplish a task. System Software or Application Software. System Software - Operating System and Utilities Program - detailed, step-by-step instructions that tell a computer how to solve a problem or carry out a task. Data - the words, numbers, and graphics that describe people, events things, and ideas. Programming Language -tool for developing programs. Compiler - software that translates instructions written in a programming language into machine level instructions/code 1 Operating System (OS) Controls the computer s use of its hardware resources Acts as a liaison between computer hardware and application software. Identified by Version No s Provides security May allow multiple users Sometimes must be updated 1. Find the WINDOWS or WINNT folder on the hard drive 2. Using Windows: Start button - look for Windows Update 2

Data - the words, numbers, and graphics that describe people, events things, and ideas. Programming Language -tool for developing programs.

2 Popular Operating Systems From Microsoft: Vista, Windows XP, Windows 98, Windows NT, Windows 2000, Windows 95 Windows 3.1, DOS, PC-DOS and MS-DOS From Apple: Mac OS X, System 9 Others: UNIX, Linux, FreeBSD, (open source) DEC VMS (for the VAX computer) 1. Go to Microsoft.com for different Windows Editions 2. How do you get to MSDOS from Windows? 3 What Comes With Windows Among other things: Utilities such as Backup, Defrag Games Wordpad, Notepad Paint graphics program Windows Media Player Windows Movie Maker Learn more about Windows Media Player 4

Go to Microsoft.com for different Windows Editions 2. How do you get to MSDOS from Windows?

3 Application Software Categories Categories: Word Processing, Spreadsheets, Database, Presentation, Suites Desktop Publishing, , WWW Browser Microsoft Office (full, not upgrade): Office 2007 Pro (reg $500, academic $ 150, Student $80) Special Offers - Microsoft, half.com or ebay.com) 1. Find installed Programs on Hard Drive 2. Get trial version of Microsoft Office 2. Get prices from outpost.com & academicsuperstore.com 5 Utilities,Device Drivers,Plugins Utility: Software designed to support and enhance the computer s ope-rating system. For example, Backup, defrag, format and scandisk come with Windows. Device Driver: Software that controls a peripheral device, such as a printer. New hardware, like a printer, comes with a device driver on floppy disk or CD. Plugins/Addons: A small program that adds features to browser; Adobe Acrobat, Windows Media Player, Real Player, Shockwave, Flash player (wmplugins.com) 1. Where do you click to defrag the hard drive? Start-Programs-Accessories-System Tools-Disk Defrag 2. Find a device driver online for an HP Printer 6

com & academicsuperstore.com 5 Utilities,Device Drivers,Plugins Utility: Software designed to support and enhance the computer s ope-rating system.

4 Backup Software and Procedures Media Diskettes 1.44 MB Zip Disks 100 MB, 250 MB and more CD-R or RW 650 MB DVD-R or RW 4-17 GB Tape Drives Various sizes Hard Drive Various sizes Software Copy to floppy, zip or CD Use Backup or Buy software for Backup procedures Decisions about Backup - MS Backup What can you not afford to lose? Do you need to be able to take it to a different location? Do you want it to be automatic? 7 Viruses and AntiVirus Software Viruses, Worms, Trojan Horses Cause Damage to files Are prevalent in labs, public computers Travel on floppy disk, Internet, attachments Popular: Microsoft Word Macro viruses, viruses Virus Checking programs Norton Antivirus program (symantec.com) McAfee Antivirus program (mcafee.com) Online Virus Checking - both sites Firewalls such as Zonealarm (zonelabs.com) 1. Is your computer protected? Start - Programs 2. Shop for Mcafee or Norton AntiVirus 3. Signs of viruses 8

Backup procedures Decisions about Backup - MS Backup What can you not afford to lose? Do you need to be able to take it to a different location? Do you want it to be automatic?

5 Software You MUST Have Adobe Reader - see Adobe.com Winzip (decompression) - see Graphics/Image Viewer (Adobe or see Tucows.com) Anti-Virus (Mcafee or Norton/Symantec) Fire Wall (for Cable or DSL) - see Zonealarm.com Other - see Tucows.com 9 Software Installation When you buy a software package... Usually self-installing from a CD or disks A file called SETUP.EXE or INSTALL.EXE starts it Contents of the CD/floppies are copied to hard disk The original version is numbered 1.0 A revision to fix a bug might be 1.01 A major change results in a new version, (e.g. 2.0 ) You usually buy the latest version Ebay and Half.com have old versions - Buyer Beware 10

com 9 Software Installation When you buy a software package... Usually self-installing from a CD or disks A file called SETUP.EXE or INSTALL.

6 Legal Issues Related to Software Copyright - grants exclusive rights to the owner; it states when you can make copies License - several types of licenses are available: shrink-wrap license, single user, multi-user Shareware - try before you buy software Public Domain (Freeware) - free software Find shareware Firewall software at tucows.com 11 Where to Buy Software Local stores: CompUSA, BestBuy, and others UALR Bookstore: offers Academic Discounts Online Stores: such as Outpost.com, Buy.com, Zones.com, Warehouse.com Online discount stores: (do a Yahoo search for Academic Discount) such as Edu.Com, Academicsuperstore.Com Caution! When buying online, look for Secure Sites ( and lock on screen) 12

com 11 Where to Buy Software Local stores: CompUSA, BestBuy, and others UALR Bookstore: offers Academic Discounts Online Stores: such as Outpost.com, Buy.com, Zones.

Chapter 7A. Functions of Operating Systems. Types of Operating Systems. Operating System Basics

Chapter 7A. Functions of Operating Systems. Types of Operating Systems. Operating System Basics Chapter 7A Operating System Basics Functions of Operating Provide a user interface Run programs Manage hardware devices Organized file storage 2 Types of Operating Real-time operating system Very fast