1. CSCE101 – Op Codes (continued), 4.4, 4.5, 5.2 Tuesday, October 31, 2006 and Thursday, November 2, 2006

2. Secondary Storage Floppy disks and zip disks Hard disks –How it works –Head crash –Controllers –RAID (Redundant array of independent disks) CDs and DVDs –How they work –DVD Zones

3. Secondary Storage (continued) Magnetic Tape Cards –Magnetic Strip –Smart Cards –Optical Cards Flash Memory –Non-volatile –Cards, sticks, drives

4. Future Developments in Processing Selling processing power Nanotechnology - molecules Optical computing – or opto-electronic DNA computing – DNA strands store information using CTGA Quantum computing – atoms

5. Future Developments in Storage Higher-density disks – perpendicular recording Polymer memory – probe storage (200 gigabits per square inch)

6. 5.2 –Input Hardware Keyboards –Wired or wireless (RF or IR) –Virtual –Specialty Mouse –Mechanical –Optical –Specialty

7. Input Hardware (continued) Touch screens Pen input –Pen input for handwriting –Light pens –Digitizer with digitizing tablet Scanners –Like photocopiers –Dots and bitmaps

8. Input Hardware (continued) Scanners (continued) –Color depth or bit depth (48-bit color depth is considered high quality.) –Resolution is measured in dots per inch (dpi) –Dpi can be 300 X 200 up to 2400 X 2400 Bar-Code readers –1D, 2D, 3D Mark and character recognition –MICR, OMR, OCR

9. Input Hardware (continued) Fax machines –Dedicated or circuit board Bar-Code readers –1D, 2D, 3D Mark and character recognition –MICR, OMR, OCR

10. Input Hardware (continued) Audio input devices –Sound board or MIDI board –Microphone –Speech recognition software For computer control To translate spoken word into text

11. Input Hardware (continued) Video input –Video cameras Videoconferencing Frame-grabber video card or full-motion video card Software Video Camera –Digital cameras Photosites on a light-sensitive processor chip capture images Light->electrons->bits

12. Input Hardware (continued) Video input (continued) –Digital cameras (continued) Can be connected to the computer using a USB or Firewire connection Or disk is inserted into computer drive Sensors – everywhere and used to monitor environment RFID tags – cattle, pets, library books Biometric input devices – hand scanners, fingerprint scanner, retinal scanners