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BUSI 240 Introduction to Information Systems Tuesday & Thursday 8: 05 am – 9: 30 am Wyant Lecture Hall Please sign the roster on the back table. 4 -1
Current Events – What’s going on? Web Running Out of Addresses Internet Sites, Carriers Are Laying the Groundwork for a New Ro The Internet is about to run out of new addresses, a milestone that is spurring Web giants like Facebook Inc. and Google Inc. to develop new versions of their sites and prompting carriers like AT&T Inc. and others to upgrade networks. This week, the organization that oversees Internet addresses is expected to dole out its last batch of existing Internet protocol addresses, a step akin to telephone companies running out of numbers to give customers. http: //online. wsj. com/article/SB 10001424052748704254304576116401267588510. html? mod=WSJ_Tech_LEA DTop 4 -2
Current Events – What’s going on? Do you know this about your cell phone? http: //abclocal. go. com/wabc/video? id=7621105 4 -3
Current Events – What’s going on? What Windows 7 Is Still Missing Microsoft's latest operating system has been well received, but a lot of important features, including system restore and automatic updating of third-party software and drivers, didn't make the cut. There's little question Windows 7 has been received with open arms by users and admins. It fixed many of the problems that plagued earlier versions of Windows, made good on the promises that seemed only half-fulfilled with Vista, and introduced a slew of new functions -- big and small -- that were also warmly received. http: //www. informationweek. com/news/windows/reviews/show. Article. jhtml; jsessionid=OWXSMT 02 GJ 13 ZQE 1 GHRSKHWATMY 32 JVN? article. ID=229000228#comments 4 -5
Current Events – What’s going on? Update: LG Confirms via Twitter. LG Optimus 3 D Picture Leaked Ahead Of MWC Reveal LG has confirmed via its MWC Twitter account that the Optimus 3 D will indeed be shown at the Mobile World Congress. They also confirmed the glasses-free 3 D display, 3 D video capability, and HDMI. LG’s "Into the New Dimension" event is scheduled for February 14, but Phandroid has gotten a hold of an image that is purported to be the LG Optimus 3 D. Although a 3 D display can’t be confirmed by the picture, we can determine that this device is not the LG Optimus 2 X or LG Optimus Black. http: //www. androidpolice. com/2011/01/31/lg-optimus-3 d-picture-leaked-ahead-of-mwc-reveal/ 4 -6
Current Events – What’s going on? Considering this phone is set to be revealed in two weeks, this certainly seems like a trustworthy tip, and the specs, while awesome, are still believable: • At least a 4" screen • Glasses-free 3 D display • Dual core processor (presumably Tegra 2) • Front-facing camera Even if you aren’t the biggest fan of 3 D, the Optimus 3 D is still an impressive device. Now we just have to wait until February 14 to get all the official details. 4 -7
Chapter 3 b Computer Hardware History of computers Types of computer systems Hardware components and functions Computer peripherals Mc. Graw-Hill/Irwin Copyright © 2007 by The Mc. Graw-Hill Companies, Inc. All rights reserved.
Construction and Operation of the Hard Disk 3 -9
The Difference Between Tracks and Cylinders 3 -10 A platter from a 5. 25" hard disk, with 20 concentric tracks drawn over the surface. Each track is divided into 16 imaginary sectors.
Types of magnetic disks Floppy disks l Magnetic disk inside a plastic jacket l Hard disk drives l Magnetic disk, access arms, and read/write heads in sealed module l RAID (Redundant arrays of independent disks) l Disk arrays of interconnected hard disk drives l Fault tolerant with multiple copies on several disks l 3 -11
Flash drive New type of permanent storage l Uses semiconductor memory l Small chip with thousands of transistors l Easily transported l Also called jump drives, USB flash drives l Source: Courtesy of Lexar Media. 3 -12
Solid State Drive Open casing of 2. 5” traditional hard disk drive (left) and solid-state drive (center). 3 -13
Pros and Cons of SSD Advantages • Faster startup (read) • Faster access to data/applications (read) • Constant performance (read) • No Noise • Higher mechanical reliability • Larger range of operating temperatures • Lower weight and size 3 -14 Disadvantages • • • Price Capacity Vulnerability to abrupt power loss • Limited write cycles • Higher Power Consumption (overall)
Magnetic Tape l Secondary storage l Tape reels and cartridges l Used in robotic automated drive assemblies l Archival storage and backup storage 3 -15
Tape Library System 3 -16
Optical Disks 3 -17
Uses of optical disks l Image processing l Long term storage of historical files of images l Scan documents and store on optical disks l Publishing materials l Catalogs, l Interactive l Video 3 -18 medium for fast access to reference directories, etc. multimedia applications games, educational videos, etc.
Chapter 4 a Computer Software Application Software Systems Software Operating Systems Mc. Graw-Hill/Irwin Copyright © 2007 by The Mc. Graw-Hill Companies, Inc. All rights reserved.
Types of software 4 -20
Software types l Application l Performs l System software information processing tasks for end users software l Manages and supports operations of computer systems and networks 4 -21
Application software l General purpose l Programs that perform common information processing jobs for end users l E. g. , word processing, spreadsheet, etc. l Also called productivity packages l Application-specific l Programs that support specific applications of end users l E. g. , electronic commerce, customer relationship management, etc. 4 -22
Software classifications Classify based on how it was developed l Custom software l Software applications that are developed within an organization for use by that organization l COTS software l Commercial Off-the-shelf (COTS) l Software developed with the intention of selling the software in multiple copies l Why would you choose Custom over COTS? l Why would you choose COTS over Custom? l 4 -23
Software Suites 4 -24
Software Suites l Software suites integrate software packages l Advantages: Cost less than buying individual packages l All have a similar GUI l Work together well l l Disadvantages Features not used by all users l Take a lot of disk space l 4 -25
Integrated Packages l Integrated l Combine packages the functions of several programs into one package l E. g. , Microsoft Works, Apple. Works l Advantages: l Many functions for lower price and smaller disk space l Disadvantage l 4 -26 Limited functionality
Web Browser l Software applications that support navigation through the point-and-click resources of the Web l Surfing the web l Becoming a universal software platform for Internetbased applications l Microsoft Explorer, Netscape Navigator, Firefox, Opera or Mozilla 4 -27
E-mail, Instant Messaging and Weblogs l E-mail l Software to communicate by sending and receiving messages and attachments via the Internet, intranet or extranet l Instant messaging (IM) l Receive l Weblog l. A electronic messages instantly or blog personal website in dated log format l Updated with new information about a subject or range of subjects 4 -28
Word processing and Desktop publishing l Word processing l Create, edit, revise and print documents l E. g. , Microsoft Word, Lotus Word. Pro and Corel Word. Perfect l Desktop Publishing l Produce printed materials that look professionally published l E. g. , Adobe Page. Maker, Microsoft Publisher and Quark. XPress 4 -29
Electronic Spreadsheets and Presentation Graphics Electronic Spreadsheets l Worksheet of rows and columns l Used for calculations and charts l E. g. , Lotus 1 -2 -3, Microsoft Excel, Corel Quattro. Pro l Presentation Graphics l Convert numeric data into graphics displays l Prepare multimedia presentations including graphics, photos, animation, and video clips l E. g. , Microsoft Power. Point, Lotus Freelance, Corel Presentations l 4 -30
Personal Information Manager and Groupware l Personal Information Manager (PIM) l Software for end user productivity and collaboration l Store information about clients, schedules, manage appointments, manage tasks l E. g. , Lotus Organizer, Microsoft Outlook l Groupware l Software that helps workgroups collaborate on group assignments l E-mail, discussion groups, databases, videoconferencing l E. g. , Lotus Notes, Novell Group. Wise, Microsoft Exchange 4 -31
Software alternatives l Outsourcing development and maintenance of software l Application service providers (ASPs) l Companies that own, operate and maintain application software and computer system resources l Use the application for a fee over the Internet l Pay-as-you-go 4 -32
Software Licensing All software (COTS, ASP) is licensed l You don’t buy software: you buy a license to use the software under the terms of the licensing agreement l Licensed to protect the vendor’s property rights l 4 -33