The Components of a Computer 1. Input Input 2. Output 3. System Unit System Unit 4. Storage Storage

The Components of a Computer What is an output device?  Hardware that conveys information to one or more people Next

What is Output? What is output? Next  Data that has been processed into a useful form,  Output device is any hardware component that can convey information to user

Output Device - Monitor What is a display device? Next  Output device that visually conveys information  Information on display device sometimes called soft copy  Monitor houses display device as separate peripheral

Output Device - Monitor What is an LCD monitor? Next  Uses liquid crystal display  Have a small footprint  Mobile devices that contain LCD displays include  Notebook computer, Tablet PC, PDA, and Smart Phone

Output Device - Monitor What are some mobile devices that have LCD screens? Next PDA smart phone Tablet PC notebook computer

Output Device - Monitor What is a CRT monitor? Next  Contains cathode-ray tube (CRT)  Screen coated with tiny dots of phosphor material  Each dot consists of a red, blue, and green phosphor  Common sizes are 15, 17, 19, 21, and 22 inches  Viewable size is diagonal measurement of actual viewing area

Output Device - Printers What is a printer? Next  Output device that produces text and graphics on a physical medium  Result is hard copy, or printout  Two orientations: portrait and landscape portrait landscape

Output Device - Printers What is a nonimpact printer? Next  Forms characters and graphics without striking paper  Ink-jet printer sprays tiny drops of liquid ink onto paper  Prints in black-and-white or color on a variety of paper types

Output Device - Printers What is a photo printer? Next  Color printer that produces photo-lab- quality pictures  Many photo printers have a built-in card slot

Output Device - Printers What is a laser printer? Next  High-speed, high-quality nonimpact printer  Prints text and graphics in very high-quality resolution, ranging from 1,200 to 2,400 dpi  Typically costs more than ink-jet printer, but is much faster

Output Device - Printers What is a thermal printer? Next  Generates images by pushing electrically heated pins against heat-sensitive paper  Dye-sublimation printer (also called a digital photo printer) uses heat to transfer dye to specially coated paper

Output Device - Printers What is a mobile printer? Next  Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, or PDA while traveling

Output Device - Printers What are label printers and postage printers? Next  Small printer that prints on adhesive-type material  Postage printer has built-in digital scale and prints postage stamps  Most also print bar codes

Output Device - Printers What is a plotter? Next  Sophisticated printer used to produce high-quality drawings  Large-format printer creates photo-realistic-quality color prints

Output Device - Printers What is a dot-matrix printer? Next  Impact printer that produces printed images when tiny wire pins strike ribbon  Impact printer forms characters by striking mechanism against inked ribbon that contacts paper

Output Device - Printers What is a line printer? Next  High-speed impact printer that prints entire line at a time  Speed measured in lines per minute (lpm)  Band printer prints fully formed characters using a hammer mechanism  Shuttle-matrix printer is high-speed printer that works like dot-matrix printer

Output Device - Speakers and Headsets What is an audio output device? Next  Computer component that produces music, speech, or other sounds  Speakers and headsets are common devices

Output Device - Fax What is a facsimile (fax) machine? Next  Device that transmits and receives documents over telephone lines

Other Output Devices What is a multifunction peripheral? Next  Provides functionality of printer, scanner, copy machine, and fax machine

Output Device - Projector What is a data projector? Next  Device that takes image from computer screen and projects it onto larger screen

Output Device - Modem What is a fax modem? Next  Modem that allows you to send and receive electronic documents as faxes external fax modem internal fax card in system unit fax machine

The Components of a Computer 1. Input Input 2. Output Output 3. System Unit 4. StorageStorage

The Components of a Computer What is the system unit? Next

The System Unit What is the system unit? Next  Case that contains electronic components of the computer used to process data  Sometimes called the chassis

The System Unit What are common components inside the system unit? Next  Memory  Adapter cards  Sound card  Video card  Ports  Drive bays  Power supply power supply ports drive bays processor memory sound card video card  Processor

The System Unit What is the motherboard? Next  Main circuit board in system unit  Contains adapter cards, processor chips, and memory chips  Also called system board

Processor Control Unit Arithmetic Logic Unit (ALU) Processor What is the central processing unit (CPU)? Next Input Devices Storage Devices Output Devices  Interprets and carries out basic instructions that operate a computer Memory DataInformation Instructions Data Information Control Unit  Control unit directs and coordinates operations in computer  Arithmetic logic unit (ALU) performs arithmetic, comparison, and logical operations  Also called the processor

Stores location from where instruction was fetched Processor Stores instruction while it is being decoded What is a register? Next Stores data while ALU computes it Stores results of calculation  Temporary high-speed storage area that holds data and instructions

The Components of a Computer What are two main components on the motherboard? Processor Also called a Central Processing Unit (CPU) The electronic component that interprets and carries out the basic instructions that operate the computer Next Memory Consists of electronic components that store instructions waiting to be executed and data needed by those instructions

The Components of a Computer 1. Input Input 2. Output Output 3. Unit Sistem Unit Sistem 4. Storage

The Components of a Computer What is storage? Storage media Physical material on which data, instructions, and information are stored Storage media Physical material on which data, instructions, and information are stored Storage device Records and retrieves items to and from storage media Storage device Records and retrieves items to and from storage media Next  Holds data, instructions, and information for future use

The Components of a Computer What is a floppy disk and USB flash drive? Next USB Flash Drive  Provides much greater storage capacity than a floppy disk or Zip® disk  Small and lightweight enough to be transported on a keychain or in a pocket USB Flash Drive  Provides much greater storage capacity than a floppy disk or Zip® disk  Small and lightweight enough to be transported on a keychain or in a pocket Floppy Disk  Thin, circular, flexible disk enclosed in a square- shaped plastic shell  Stores up to about 1.4 million characters Floppy Disk  Thin, circular, flexible disk enclosed in a square- shaped plastic shell  Stores up to about 1.4 million characters

The Components of a Computer What is a hard disk? Next  Provides greater storage capacity than a floppy disk, Zip disk, or USB flash drive  Most are housed inside of the system unit

The Components of a Computer What is a compact disc? Next  Flat, round, portable metal disc  CD-ROM  DVD-ROM

The Components of a Computer What is a communications device? Next Hardware component that enables a computer to send and receive data, instructions, and information Occurs over cables, telephone lines, cellular radio networks, satellites, and other transmission media

StorageCommunications Advantages and Disadvantages of Using Computers What are the advantages of using computers? Speed Reliability Next Consistency

Advantages and Disadvantages of Using Computers What are the disadvantages of using computers? Next Violation of Privacy Impact on Environment Impact on Labor Force Health Risks

Categories of Computers Next What are the categories of computers? Personal Computers (desktop) Mobile Computers and Mobile Devices Game Consoles Servers Mainframes Supercomputers Embedded Computers

Personal Computers What are the two most popular series of personal computers? Next  PC and compatibles use the Windows operating system  Apple Macintosh uses the Macintosh operating system (Mac OS)

Personal Computers What is a desktop computer? Next  Designed so all of the components fit entirely on or under a desk or table

Mobile Computers and Mobile Devices What is a notebook computer? Next  Portable, small enough to fit on your lap  Also called a laptop computer  Generally more expensive than a desktop computer

Mobile Computers and Mobile Devices What is a Tablet PC? Next  Especially useful for taking notes  Resembles a letter-sized slate  Allows you to write on the screen using a digital pen

Mobile Computers and Mobile Devices What are mobile devices? Next Internet-enabled telephone is a “smart telephone” Small enough to carry in a pocket

Mobile Computers and Mobile Devices What is a handheld computer? Next Used by mobile employees such as meter readers and delivery people Small enough to fit in one hand

Mobile Computers and Mobile Devices What is a personal digital assistant (PDA)? Next  Provides personal organizer functions  Calendar  Appointment book  Address book  Calculator  Notepad

Mobile Computers and Mobile Devices What are smart phones? Next A smart phone is an Internet-enabled telephone that usually provides PDA capabilities

Game Consoles What are game consoles? Next Mobile computing device designed for single-player or multiplayer video games

Summary of Introduction to Computers Basic computer concepts The term, computer The advantages and disadvantages of using computers The components of a computer The purpose of a network The uses of the Internet Computer software Categories of computers Types of computer users Computer applications in society