1. Input/Output and Storage Input Devices: Giving Commands Output Device: Engaging our Senses Storage: Holding data for Future use

2. Digital Cameras Digital cameras: Record images on digital storage medium rather than film Can either be still cameras or video cameras Typically use flash memory for storage Images can be edited, posted to a Web page, burned to a CD or DVD disc, etc. Digital still cameras Available in a wide variety of sizes and capabilities Photos can be transferred to a PC or printer Camera quality is measured in megapixels Digital video cameras Digital camcorders PC video cameras (PC cams, Web cam) 3. Audio Input Audio input: The process of entering audio data into the computer Voice (narrations, podcasts, etc.) Music (from CDs, MIDI keyboards, etc.)Voice input systems (speech recognition systems) Enable a computer to recognize the human voice Consistof a microphoneorheadsetand appropriatesoftware Can be used to dictate text or commands into a PC 4. Voice Input Systems 5. Display Devices Display device: Presents output visually Monitor: Display device for a desktop PC Display screen: Screen built into a variety of devices Notebook and handheld PCs, Mobile phones and mobile devices Ebooks readers, digital photo frames, and other consumer devices, and many other devices Digital signage systems Epaper 6. Display Device Characteristics Color vs. monochrome displays CRT vs. flatpanel displaySize Screen resolution Wired vs. wireless2D vs. 3D Digital TV and HDTV capabilities Touch screen capabilities 7. Screen Resolution 8. FlatPanel Display Technologies Liquid crystal displays (LCDs): -Use charged liquid crystals between sheets of glass or plasticRequires backlighting LED (Light emitting diode): Used in displays as well as a variety of consumer products 9. Data and Multimedia Projectors Data projector: Display device that projects all computer output to a wall or projection screenMost data projectors today can project video, in addition to computer output Can be wireless or integrated into devices FogScreen systems projects on a thin layer of fog Holographic projectors are in development 10. Printers Printers: Produce hard copy Printer CharacteristicsPrinting technology used Impact vs. nonimpact Color vs. black and white Personal vs. network printers Print resolution Print speed Possible connections Multifunction capabilities 11. Laser Printers Laser printer: Uses toner powder and technology similar to that of a photocopier to produce images on paper:The standard for business documents Print one entire page at a time Generally faster and have better quality than inkjet printersCan be black and white or color Common print resolution for laser printers is between 600 and 2,400 dpi Use toner cartridges 12. InkJet Printers Inkjet printer: Sprays droplets of ink to produce images on paper: Usually print in colorOften the choice for home use Print fairly slowly, one line at a time Quality not quite as good as a laser printerUse inkjet cartridges Newer printers with full width printheadsare much faster Potential applications for the futureDispensing liquid metal, aromas, computer chips and other circuitry, printing human tissue 13. SpecialPurpose Printers Photo printers Barcode, label, and postage printersPortable printers Plotters and wideformat inkjet printers 3D printers 14. Audio Output Audio output: Output in the form of voice or music SpeakersVoice output systems Headphones and headsets Earphones and earbuds 15. Storage Primary storage Volatile TemporarySecondary storage characteristics Media (optical, magnetic) Capacity Storage devices Access speedSecondary storage Nonvolatile Permanent 16. Secondary Storage Devices 17. Floppy Disks Diskettes Floppies Portable storage media Floppy disk drives (FDD) Traditional Floppy Disk 18. Hard Disks Use thicker, metallic platters for storage Faster than a floppy diskette Large capacity Sensitive instruments 19. Optical Disks Compact Permanent storage Laser beams reflect off pits Two common types CD DVD 20. Compact Disc Optical format From 650 MB to 1 GB capacity Rotation speeds vary Types Read only: CDROM Write once: CDR Rewriteable: CDRW Picture CDs and Photo CDsDigital Versatile Disc Digital Versatile Disk or Digital Video Disk (DVD) Similar to CDs, but can store more data Types Read only Write once Rewritable 21. Other Types of Secondary Storage Solidstate storage - Flash memory cards Widely used in notebook computers Used to record MP3 music files - Key chain hard drives Key chain flash memory devices Connects to a USB port Internet hard drives Magnetic tape - External storage - Provides sequential access Information stored in sequence Slower than disks which provide direct access - Magnetic tape streamers or tape cartridges used by both mainframes and microcomput 22. A Look to the Future BluRay Technology New standard in storage BluRay New disks use blue laser light instead of the red laser light used in traditional CD players Disks may ultimately hold Over 30GB on onesided disks Over 50GB on twosided disks