Source Data Automation- automates input data near the source in order to avoid entry errors
Keyboards- most popular general purpose input deviceQWERTY- input data device
Special Purpose input devices are becoming more frequently used than in the past because of the ever changing world applications and software.
-magnetic ink character recognition (MICR)- reads special magnetic ink characters such as those written on the bottom of checks-optical character recognition (OCR)- reads hand printed characters-point of scale device (POS)- retail scanner that reads the code from tag and enters it into the computer system-Optical mark recognition (OMR)- reads “bubbled in” forms
Output- good output is easy to interpret Displays, printers, speakers=most common types of outputVirtual reality systems- tactile and olfactory output
-They combine powerful graphics that generate realistic images.-GPU- some graphics cards include GPU to process graphics (way to process graphics that takes the load off of video memory, RAMDAC, CPU…..
-Desktop systems- graphics card/video card is plugged into the motherboard-notebooks- graphics card/video card is typically integrated into the motherboard.
-HDTVs = 2x the resolution of traditional TV displays, sharper crisper images.-3D displays= uses polarization technologies to add depth and realism., companies such as Samsung are now creating 3D tv home systems-LCD projectors- images from computer to big screen
-CRT- big and bulky,being replaced by smaller, less bulky screens-LCDs are thin and flat, popular as both computers and televisions
-LEDs are gaining popularity as green technologies because they use less energy and do not require the use of mercury. -E-paper makes it easy to see the screen outdoors and is easier on the viewers eyes.
-Audio output has become very popular with the growth of mobile media such as smart phones and Ipods- Multimedia and gaming enthusiasts usually purchase higher quality sound systems
-Screen–readers read allowed text displayed on screens-Haptic Output is output that the user can feel-Scent Dome is a USB device that delivers scent output by way of delivering fragrances as commanded by the computer.-Edible output: printers have been created to print flavored pieces of paper for tasting samples sent over the internet.
-Peripherals increase computer capabilities-special-purpose cables and connectors are not supported by all computers-USB invented to standardize interfaces. All use common connector design
-Wireless technologies further expand the capabilities of a computer-Example is Bluetooth
-USB Mini Fridge uses power from computer via USB cord. Can fit a can of Coke-Mini USB Monitor- Tiny touch screen monitor for extra desk space. -
Input/output (I/O)<br />Input is how data is received into a computer system which results in outputthat is displayed to the user.<br />Multi-purpose devices: UPS device for signatures<br />
Input Devices<br />The input device captures data and enters it into the computer system.<br />Source Data Automation<br />General-Purpose and Special-Purpose <br />
General-Purpose Input Device<br />General-purpose input devices can be used in multiple computing activities.<br />Keyboard<br />QWERTY<br />Pointing Devices select items displayed on a screen.<br />
General-Purpose Input Devices Cont’d<br />Users can use finger or stylus to directly select objects on a screen with the use of Touch Screens.<br />Users can use multiple fingers to select objects with Multitouch Displays.<br />
Special-Purpose Input Devices<br />Special-purpose input devices are used in specific computing activities.<br />Game controllers and joysticks, webcams, hand held scanners…<br />
Special-Purpose Input Devices Cont’d<br />Magnetic ink character recognition (MICR)<br />Optical character recognition (OCR)<br />Point-of-sale (POS) devices<br />Optical mark recognition (OMR)<br />Scantron reader<br />
Output Devices<br />Output devices allow users to view the results of the input.<br />Historically visual and audio<br />Virtual reality systems, new wave of output<br />Displays, Printers, Speakers<br />
Video Card<br />Video card/graphic cards translates binary data from the CPU and turns it into a picture that video users can see.<br />Graphics Processing Unit (GPU)<br />
Video Card Cont’d<br />Desktop systems <br />Graphics Processing Unit (GPU)<br />Notebook systems<br />Integrated Graphics Processor<br />
Display<br />A display allows users to view the output on a screen.<br />Display screens = monitors<br />Display Options:<br />High definition (HDTV)- 2xs the resolution<br />3D displays- home systems<br />LCD projectors<br />
Display Technologies<br />Cathode ray tube (CRT) display<br />Reads electron beams across a fluorescent screen.<br />Liquid crystal display (LCD)<br />Uses liquid crystals to display images on a backlit screen<br />Plasma Display<br />Uses plasma gas to create light<br />
Display Technologies Cont’d<br />Light emitting diode (LED) display<br />Uses LEDs to provide backlight<br />Green Technology<br />Electronic Paper (e-paper)<br />Uses electric charges to display the image<br />Kindle<br />
Audio and Special Media Output<br />Audio and Special Media Output devices provide output other than sight.<br />Sounds systems: <br />CD/MP3 music players<br />DVD/Blu-ray disk players<br />Multimedia and gaming enthusiasts<br />Surround sound with subwoofers<br />
Audio and Special Media Output Cont’d<br />Screen-reader programs for vision impaired<br />JAWS<br />Haptic Output<br />Vibrations<br />The Scent Dome from TriSenx<br />Olfactory-directed output<br />Edible Output<br />
Expansion<br />Expansions enable computers to interact with various external devices.<br />External devices = peripherals<br />Ports connect to peripherals<br />Universal Serial Bus (USB)<br />USB 3.0 is the fastest <br />
Expansion Cont’d<br />Expansion Cardis used for specialty peripheral devices<br />Expansion Slots are located in motherboard<br />Wireless technologies <br />Bluetooth <br />
Innovative I/O Technologies<br />There are endless possibilities for new I/O technologies<br />USB Mini Fridge<br />Mini USB Monitor<br />USB Lamp<br />Any Questions?<br />