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Slide 1:Essential Introduction to Computers How to Purchase a Personal Computer
Slide 2:Objectives Define the term computer and discuss the four basic computer operations: input, processing, output, and storage
Define data and information
Explain the principal components of the computer and their use
Describe the use of hard disks, USB flash drives, floppy disks, and other storage media
Discuss computer software and explain the difference between system software and application software
Slide 3:Objectives Identify several types of personal computer application software
Discuss computer communications channels and equipment and the Internet and World Wide Web
Define e-commerce
Explain how to purchase a personal computer
Slide 4:What Is a Computer? A computer is an electronic device, operating under the control of instructions stored in its own memory, that can accept data (input), process the data according to specified rules (process), produce results (output), and store the results (storage) for future use
Information Processing Cycle
Slide 5:What Are the Components of a Computer?
Slide 6:Input Devices Any hardware component that allows you to enter data, programs, commands, and user responses into a computer
Input Device Examples
Keyboard
Mouse
Slide 7:System Unit The motherboard, or system board, is the main circuit board of the system unit
The processor, also called the central processing unit (CPU), interprets and carries out the basic instructions that operate a computer
The control unit interprets the instructions
The arithmetic/logic unit performs the logical and arithmetic processes
Memory, also called random access memory, or RAM, consists of electronic components that store data, instructions, and information, as needed by the processor
Slide 8:System Unit
Slide 9:Output Devices Output devices make the information resulting from processing available for use
Output Device Examples
Printers
Impact
Nonimpact
Photo
Display Devices
CRT
LCD
Slide 10:Storage Devices Used to store instructions, data, and information when they are not being used in memory
Slide 11:Storage Devices Magnetic disks use magnetic particles to store items on a disk’s surface
Floppy disks
Zip disks
Hard disks
Slide 12:Storage Devices Optical discs
CD-ROM
CD-R
CD-RW
DVD-ROM
DVD-R
DVD+R
DVD-RW
DVD+RW
DVD+RAM
Tape
Slide 13:Storage Devices Miniature mobile storage media
Slide 14:Communications Devices A communications device is a hardware component that enables a computer to send (transmit) and receive data, instructions, and information to and from one or more computers
Communications occur over transmission media, such as telephone lines, cables, cellular radio networks, and satellites
Slide 15:Computer Software System software consists of programs to control the operations of computer equipment
Instructions in the operating system tell the computer how to perform the functions of loading, storing, and executing an application program and how to transfer data
When a computer is turned on, the operating system is loaded into the computer’s memory from auxiliary storage, a process called booting
Most computers use an operating system that has a graphical user interface (GUI)
Slide 16:Computer Software
Slide 17:Computer Software Application software consists of programs that tell a computer how to produce information
Word processing software
Spreadsheet software
Database software
Presentation Graphics software
Slide 18:Computer Software
Slide 19:Networks and the Internet A network is a collection of computers and devices connected via communications media and devices
A local area network (LAN) connects computers in a limited geographic area
A wide area network (WAN) covers a large geographical area
Slide 20:Networks and the Internet
Slide 21:Networks and the Internet The world’s largest network is the Internet
Most users connect to the Internet in one of two ways:
Internet service provider
Online service provider
Slide 22:The World Wide Web One of the more popular segments of the Internet is the World Wide Web, also called the Web
A Web page is a document that contains text, graphics, sound, and/or video and has built-in connections, or hyperlinks to other Web documents
A Web site is a related collection of Web pages
You access and view Web pages using a software program called a Web browser
A Web page has a unique address, called a Uniform Resource Locator (URL)
Slide 23:The World Wide Web
Slide 24:Electronic Commerce When you conduct business activities online, you are participating in electronic commerce, also known as e-commerce
Business to consumer (B2C) involves the sale of goods to the general public
Consumer to consumer (C2C) involves one consumer selling directly to another
Business to business (B2B) provides goods and services to other businesses
Slide 25:How to Purchase a Personal Computer Do you want a desktop computer, mobile computer, or personal mobile device?
For what purposes will you use the computer?
Should the computer be compatible with the computers at school or work?
Should the computer be a Mac or PC?
Slide 26:How to Purchase a Desktop Computer Determine the specific software you want to use on your computer
Look for bundled software
Avoid buying the least powerful computer available
Consider upgrades to the mouse, keyboard, monitor, printer, microphone, and speakers
Determine whether you want to use the telephone lines or broadband (cable or DSL) to access the Internet
Slide 27:How to Purchase a Desktop Computer If you are using a dial-up or wireless connection to connect to the Internet, then select an ISP or OSP
Use a worksheet to compare computers, services, and other considerations
If you are buying a new computer, consider your several purchasing options
If you are buying a used computer, stay with name brands such as Dell, Gateway, Hewlett-Packard, and Apple
If you have a computer and are upgrading to a new one, then consider selling or trading in the old one
Slide 28:How to Purchase a Desktop Computer Be aware of hidden costs
Consider more than just price
Avoid restocking fees
Use a credit card to purchase your new computer
Consider purchasing an extended warranty or service plan
Slide 29:How to Purchase a Notebook Computer Purchase a notebook computer with a sufficiently large active-matrix screen
Experiment with different keyboards and pointing devices
Make sure the notebook computer you purchase has a CD and/or DVD drive
If necessary, upgrade the processor, memory, and disk storage at the time of purchase
Slide 30:How to Purchase a Notebook Computer The availability of built-in ports on a notebook computer is important
If you plan to use your notebook computer for note-taking at school or in meetings, consider a notebook computer that converts to a Tablet PC
Consider purchasing a notebook computer with a built-in wireless card to connect to your home network
If you are going to use your notebook computer for long periods without access to an electrical outlet, purchase a second battery
Slide 31:How to Purchase a Notebook Computer Purchase a well-padded and well-designed carrying case
If you travel overseas, obtain a set of electrical and telephone adapters
If you plan to connect your notebook computer to a video projector, make sure the notebook computer is compatible with the video projector
For improved security, consider a fingerprint scanner
Slide 32:How to Purchasea Tablet PC Make sure the Tablet PC fits your mobile computing needs
Decide whether you want a convertible or pure Tablet PC
Be sure the weight and dimensions are conducive to portability
Port availability, battery life, and durability are even more important with a Tablet PC than they are with a notebook computer
Slide 33:How to Purchasea Tablet PC Experiment with different models of the Tablet PC to find the digital pen that works best for you
Check out the comfort level of handwriting in different positions
Make sure the LCD display device has a resolution high enough to take advantage of Microsoft’s ClearType technologies
Test the built-in Tablet PC microphone and speakers
Slide 34:How to Purchasea Tablet PC Consider a Tablet PC with a built-in PC video camera
Review the docking capabilities of the Tablet PC
Wireless access to the Internet and your e-mail is essential with a Tablet PC
Review available accessories to purchase with your Tablet PC
Slide 35:How to Purchase a Personal Mobile Device Determine the programs you plan to run on your device
Consider how much you want to pay
Determine whether you need wireless access to the Internet and e-mail or mobile telephone capabilities with your device
For wireless devices, determine how and where you will use the service
Slide 36:How to Purchase a Personal Mobile Device Make sure your device has enough memory
Practice with the touch screen, handwriting recognition, and built-in keyboard before deciding on a model
Decide whether you want a color display
Compare battery life
Slide 37:How to Purchase a Personal Mobile Device Seriously consider the importance of ergonomics
Check out the accessories
Decide whether you want additional functionality
Determine whether synchronization of data with other devices or personal computers is important
Slide 38:Summary Define the term computer and discuss the four basic computer operations: input, processing, output, and storage
Define data and information
Explain the principal components of the computer and their use
Describe the use of hard disks, USB flash drives, floppy disks, and other storage media
Discuss computer software and explain the difference between system software and application software
Slide 39:Summary Identify several types of personal computer application software
Discuss computer communications channels and equipment and the Internet and World Wide Web
Define e-commerce
Explain how to purchase a personal computer
Slide 40:Essential Introduction to Computers Complete