Chapter 7

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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


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