Chapter 7
impact printer
forms characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper
nonimpact printer
forms characters and graphics on a piece of paper without actually contacting the paper
thermal printer
generates images by pushing electrically heated pins against heat sensitive paper
streaming cam
has the illusion of moving images because it sends a continuous stream of still images
flat panel display
having a shallow depth and a flat screen
laser printer
high speed, high quality nonimpact printer
bar codes
identification code that consists of either a set of vertical lines and spaces with different widths or a 2D pattern of dots, squares, or other images
ocr devices
include a small optical scanner for reading characters and sophisticated software to analyze what is read
soft copy
info on a display exists electronically and appears for a temporary period
keyboard
input device that contains keys you press to enter data and instructions in a computer
digital pen
input device that converts handwriting into digital format which users can upload to a computer
user response
instruction a user issues by responding to a message displayed by a program or app
toggle key
key that switches between two states each time a user presses the key (caps lock)
scanner
light sensing input device that reads printed text or graphics and then translates the results into a form the computer can process
video conference
meeting between two or more geographically separated people who use a network or the internet to transmit audio and video data
HDTV
most advanced form of tv, working with digital broadcast signals, transmitting digital sound, supporting wide screens, and providing higher resolutions
gesture
motion you make on a touch screen with the tip of one or more fingers
input devices
mouse, touch screen, stylus, microphone, built-in webcam, scanner, bar code reader, keyboard
air gestures
moving your body or handheld input device through the air
all-in-one printer
multifunction printer(MFP) looks like printer or copy machine that prints, scans, copies, and faxes
multi-touch
multiple points of contact at the same time
ink-jet printer
nonimpact printer that forms characters and graphics by spraying tiny liquid drops of ink onto a paper
frame rate
number of frames per second (fps)
data collection device
obtains data directly at the location where the transaction or event takes place
keyboard shortcut
one or more keyboard keys that you press to perform an operating system or application related task.
bar code reader
optical reader that uses laser beams to read bar codes
source document
original form of the data (time cards, paychecks, photos
display
output device that visually conveys text, graphics, and video information
mouse
pointing device that fits under the palm of your hand comfortably
toner
powdered ink
tactile output
provides the user with a physical response from the device
OCR(optical character recognition) software
read and convert text documents into electronic files
OMR device
read hand drawn marks, such as circles and triangles
MICR(magnetic-ink character recognition) devices
read text printed with magnetized ink
RFID reader
reads info on the tag via radio waves
magstripe reader
reads the magnetic strip on the back of credit cards, bank cards, id cards, ect
digital video (DV) camera
records video as digital signals that you can transfer directly to a computer with the right connection
Americans with Disabilities Act
requires any company with 15 or more employees to make reasonable attempts to accommodate the needs of the physically challenged
Liquid crystal display(LCD)
sandwiches a liquid compound between two sheets of material that presents sharp, flicker free images on a screen when eliminated
AMOLED(active-matrix OLED)
screen uses both active-matrix and OLED technologies, combining the benefits of high quality viewing from all angles with lower power consumption
signature capture pad
signing on a credit card
pixel
single point in electronic image
stylus
small metal or plastic device that uses pressure to write
touchpad
small, flat, rectangular pointing device that is sensitive to pressure and motion
compact keyboard
smaller than standard keyboard and usually does not include number pad
plotters
sophisticated printers used to produce high quality drawings like blueprints and maps
trackball
stationary pointing device with a ball on its top or side
portrait
taller than wider
PictBridgeh
technology that allows you to print directly from a camera by connecting a cable to USB port on printer
force feedback
technology that sends resistance to the device in response to actions of the user
RFID (radio frequency identification)
technology that uses radio signals to communicate with a tag places in or attached to an object, person, or animal
contrast ratio
the difference in light intensity between the brightest white and darkest black that can be produced on a display
resolution
the number of horizontal and vertical pixels in a display
video input
the process of capturing full motion images and storing them on a computers storage memory
audio input
the process of entering any sound into a computer such a speech, music, and sound effects
voice input
the process of entering input by speaking into a microphone
candela
the standard unit of luminous intensity
response time
the time in milliseconds that it takes to turn a pixel on or off
touch screen
touch sensitive display device
pen input
touching a stylus or digital pen on a flat surface to write
handwriting recognition software
translates the handwritten into typed text that the computer can process
webcam
type of DV camera that enables you to capture video and still images for viewing or manipulation on a computer
nit
unit of visible light intensity equal to one candela per square meter
upc
universal product code
subwoofer
used to boost low bass sounds
plasma display
uses gas plasma technology which sandwiches a layer of gas between two gas plates
laser mouse
uses laser sensors that emit and sense light to detect mouse movement
LCD projector
uses liquid crystal display technology, attaches directly to computer and uses its own light source to display the info shown
optical mouse
uses optical sensors that emit and sense light to detect mouse's movement
OLED (organic LED)
uses organic molecules that are self-illuminating and do not require a backlight
digital light processing (DLP) projector
uses tiny mirrors to reflect light which produces crisp, bright, colorful images that can be clearly seen
active-matrix (TFT)
which uses a separate transistor to apply charges to each liquid crystal cell and displays high quality color viewable from all angles
landscape
wider than taller
motion-sensing device
communicate with a game console or a personal computer using wired or wireless technology.
large format printer
creates photo realistic quality color prints
output
data that has been processed into a useful form
aspect ratio
defines a displays width relative to its height
ergonomic keyboard
design that reduces the chance of repetitive strain injuries(RSIs) of the wrist and hand
monitor
display that is packaged as a separate peripheral device
native resolution
displays that are optimized for a specific resolution
dot pitch (pixel pitch)
distance in millimeters between pixels on a display
printer resolution is measured by?
dots per inch
hard copy(printout)
either in portrait or landscape orientation
Digital video interface(DVI) port
enables digital signals to transmit directly to a monitor
gaming keyboard
for users playing games on computer or online
dye sublimation printer
(digital photo printer) uses heat to transfer colored dye to specially coated paper
graphics tablet
(digitizer) electronic plastic board that detects and converts movements of a stylus or digital pen into digital signals that are sent to the computer.
function keys
(f2) special keys programmed to issue a command to a computer
motion input
(gesture recognition) users can guide on screen movements with air gestures
keyboard monitoring software
(keylogging software) runs undetected and stores every keystroke for retrieval later.
QR code
(quick response) 2D bar code because It stores info in both a vertical and horizontal direction
voice recognition
(speech recognition) the capability of distinguishing spoken words
the aspect ratio for a widescreen monitor is?
16:9 or 16:10
Retina display
LCD technology is built into the screen instead of behind and produces more pixels per inch of display
command
an instruction that causes a program or app to perform a specific function
input
any data and instructions entered into the memory of a computer
wireless keyboard
battery powered device that transmits data to the computer or mobile device using wireless technology
graphics processing unit(GPU)
chip that controls the manipulation and display of a graphic
HDMI(high definition media interface)
combines DVI with HD television and video
data
a collection of unprocessed items including texts, numbers, images, audio, and video.
pointing stick
a pressure sensitive pointing device shaped like a pencil eraser that is positioned between the keys and acts as a mouse
software
a series of related instructions that tells a computer what tasks to perform and how to perform them
pointer
a small symbol on the screen whose location moves as the pointer device moves
touch mouse
a touch-sensitive mouse that recognizes touch gestures in addition to detecting movement of the mouse and traditional click and scroll operations
video call
all parties see one another as they communicate over the internet
voice recognition application
allows users to dictate text and enter instructions by speaking into a microphone
music production software
allows users to record, compose, mix, and edit music and sounds
display port
alternative to DVI that also supports HDMI
touch sensitive pad
an input device that contains buttons or wheels that operate with a thumb or other finger
