Chapter01 - Introduction to Using Computers and IT

Chapter 1 Introduction toComputersIntroduction to using computers and IT

CT002-4-0 Computing and ITComputer Historical Perspective & Future Trends

Topic & Structure of the lessonThe components of a computerThe categories of computersElements of an Information SystemCategories of users


Learning Outcomes At the end of this lecture, YOU should be able to :Slide * (of 57) Explain the importance of computer literacyIdentify the various types of computer usersDefine computerExplain what is a information process cycleIdentify the components of a computerDiscuss the advantages and disadvantages of using computersDescribe the categories of computersDiscuss computer applications in society

Slide * (of 57)


Key Terms you must be able to useSlide * (of 57) If you have mastered this topic, you should be able to use the following terms correctly in your assignments and exams:

UserDataInformationHardwareSoftwarePersonal computersMobile computersMid-range serversMainframesSupercomputersPersonal Digital Assistant (PDA)Information System

Slide * (of 57)


Computer LiteracyWhat is computer literacy?Knowledge and understanding of computers and their usesComputers are everywhere


What Is a Computer?How is a computer defined?Electronic device operating under the control of instructions stored in its own memoryComputer:


What Is a Computer?What is the information processing cycle?Series of input, input, process, output and storage activities performed by a computerInput : Any data or instructions you enter into a computer

Process :Manipulate the input (data) to produce output (information)

Output : Data that has been processed into information

Storage : Area in a computer that can hold data and information for future use

Communication :The capability of communicating with other computers


The Components of a ComputerHardware Electric, Electronic and Mechanical components contained in a computer

Software Series of instructions that tells a computer what to do and how to do

What are Hardware and Software ?



Advantages Using Computers


Disadvantages Using Computers


Networks and the InternetWhat is a network?Collection of computers and devices connected together


Networks and the InternetInternet:Worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individualsWhy do users access the Internet?


Networks and the InternetWhat is the Web?A Web site is a collection of related Web pagesA Web page contains text, graphics, audio, video, and links to other Web pagesYou can share information on a social networking Web site or a photo sharing communityBillions of documents, called Web pages, available to anyone connected to the InternetA blog consists of time- stamped articles in a journal formatA podcast is recorded audio stored on a Web site that can be downloaded


Computer SoftwareGraphical user interface (GUI)?:Allows you to interact with the software using text, graphics, and visual images such as iconsControls how you enter data and instructions and how the screen displays information


Computer Software


Categories of ComputersWhat are the categories of computers?

Personal Computers (desktop)Mobile Computers and Mobile DevicesGame ConsolesServersMainframesSupercomputersEmbedded Computers


Personal ComputersWhat are the two most popular styles of personal computers?


Personal ComputersWhat is a desktop computer?Designed so all of the components fit entirely on or under a desk or table


Mobile ComputersWhat is a notebook computer?What is a Tablet PC?Especially useful for taking notesResembles a letter-sized slateAllows you to write on the screen using a digital penPortable, small enough to fit on your lapAlso called a laptop computerUsually more expensive than a desktop computer with equal capabilities


Mobile devices


Game ConsolesWhat are game consoles?


ServersWhat types of servers are there?Mainframe Very powerful, expensive computer that supports thousands of connected usersSupercomputer The fastest, most powerful, most expensive computer. Used for applications requiring complex mathematical calculationsA server controls access to network resources and provides centralized storage


Embedded ComputersWhat is an embedded computer?

A special-purpose computer that functions as a component in a larger productUse in Consumer electronicsHome automation devicesAutomobilesProcess controller and roboticsComputer devices and office machines


Elements of an Information SystemWhat are information system elements?HardwareSoftwareDataPeopleProcedures


Categories of users


Examples of Computer UsageWhat software is available for a home user?p. 26 Fig. 1-28Personal finance managementWeb accessCommunicationsEntertainment


Examples of Computer UsageWhat software is available for a small office/home office (SOHO) user?Productivity softwareSpecialty softwareWeb usageE-mail


HardwareNotebook computersTablet PCsInternet-enabled PDAsSmart phonesExamples of Computer UsageWhat is available for a mobile user?SoftwareWord processingSpreadsheetPresentation graphics software


Examples of Computer UsageWhat are the needs of a power user?Speed and large amounts of storageTypes of power usersEngineersScientistsArchitectsDesktop publishersGraphic artists


Examples of Computer UsageWhat are the needs of the large business user?PayrollInventoryE-commerceDesktop publishing


Computer Applications in SocietyWhat are some examples of computer applications in society?


Slide * (of 57) Quick Review Question Define the term computer literacyDefine the term a userDifferentiate between data and informationList the categories of computersDifferentiate between notebook and desktop computersDefine handheld computersList the five elements in an Information System

Slide * (of 57)


Slide * (of 57) Summary of Main Teaching Points

Basic computer conceptsThe components of a computerThe categories of computersThe advantages and disadvantages of using computersTypes of usersElements of an Information System

Slide * (of 57)


Question and Answer SessionSlide * (of 57) Q & A

Slide * (of 57)


What we will cover nextChapter 2 The Internet and WWWSlide * (of 57)

Slide * (of 57)

Documents

Chapter01 - Introduction to Using Computers and IT