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Input
From Discovering Computers 2012 Shelly/Vermaat Chapter 5
135
Computer Science
Undergraduate 1
07/06/2013

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Term
input
Definition
any data/instructions entered into a computer's memory
Term
data
Definition
a collection of uprocessed items, including text, numbers, images, audio/video
Term
program
Definition
a series of related instructions that tell a computer what tasks to perform and how
Term
command
Definition
an instruction that causes a program to perform a specific action
Term
user response
Definition
an instruction a user issues by replying to a question displayed by a program
Term
input device
Definition
any hardware component that allows users to enter data/instructions (programs, commands/user responses) into a computer
Term
keyboard
Definition
an input device that contains keys users press to enter data and instructions into a computer
Term
insertion point
Definition
a symbol on the screen that indicates where the next character you type will appear
Term
another name for insertion point
Definition
cursor
Term
enhanced keyboard
Definition
most common type for current desktops and has 12+ function keys, 2 CTRL, 2 ALT, arrow/additonal keys between typing area and numberic keypad
Term
function keys
Definition
are programmed to issue commands to a computer
Term
toggle key
Definition
switches between two states each time it is pressed
Term
2 most used examples of a toggle key
Definition
NUM LOCK / CAPS LOCK
Term
gaming keyboard
Definition
includes programmable keys for customization, lights up for visibility in all lighting, some have displays that show statistics
Term
wireless/cordless keyboard
Definition
battery powered device that transmits data to the system unit w/wirelees tech like radio waves (Bluetooth) or infrared light waves (IrDA)
Term
how do most wired keyboards connect to the system unit
Definition
USB port
Term
ergonomic keyboard
Definition
a design that reduces the chance of wrist and hand injuries
Term
ergonomics
Definition
incorporates comfort, efficiency, and safety into the design of the workplace
Term
predictive text input
Definition
a key is pressed and software predicts the word you want (usually on a cell phone)
Term
pointing device
Definition
an input device that allows users to control a pointer on the screen
Term
pointer
Definition
a small symbol on the screen whose location/shape change as users move a pointing device
Term
mouse
Definition
a pointing device(wired or wireless) that fits under palm/most common type of desktop pointing device
Term
mouse pointer
Definition
a user controlled pointer via a mouse
Term
optical mouse
Definition
uses devices that emit/sense light to detect it's own movement with optical sensors or lasers
Term
laser mouse
Definition
an optical type that uses lasers instead of optical sensors and is more expensive than one w/optical sensors
Term
air mouse
Definition
is motion sensing type w/extra buttons that allow the control of objects, media players/slide shows by moving it through the air
Term
mouse gestures
Definition
user performed operations done by holding a button/moving the device in a pattern
Term
trackball
Definition
stationary pointing device w/ball on top or side usually ping-pong ball in size
Term
touchpad
Definition
small, flat, rectangular pointing device sensitive to pressure/motion
Term
pointing stick
Definition
pressure-sensitive pointing device between keyboard keys that look like a pencil eraser
Term
touch screen
Definition
a display device that is touch-sensitive
Term
multi touch
Definition
a screen that recognizes multiple points of contact at the same time
Term
kiosk
Definition
a free standing computer usually with a touch screen
Term
microsoft surface
Definition
a new touch screen w/ a 30" tabletop display allowing multiple users at the same time
Term
touch-sensitive pad
Definition
usually on media players w/out touch screens and can contain buttons/wheels
Term
pen input
Definition
you touch a stylus or digital pen on a flat surface to write, draw, or make selections
Term
stylus
Definition
small metal or plastic device that looks like a tiny ink pen/uses pressure instead of ink
Term
digital pen
Definition
larger than a stylus w/more functionality and usually pressure sensitive
Term
handwriting recognition software
Definition
a program that translates handwritten characters created w/stylus or pen into characters computers can process
Term
signature capture pad
Definition
takes handwritten signature and transmits to a computer
Term
graphics tablet
Definition
flat, rectangular, electroic, plastic board that transmits drawn graphics to a computer screen
Term
digitizer
Definition
another term for the graphics tablet used w/large-scale applications
Term
portable keyboard
Definition
full-size and usually used w/ a smart phone or PDA
Term
optical keyboard
Definition
projects the image on a flat surface
Term
game controller
Definition
an input device that directs the movements/actions of on-screen objects
Term
gamepad
Definition
held w/both hands and has buttons and/or sticks
Term
joystick
Definition
handheld vertical lever mounted on a base
Term
wheel
Definition
usually also have foot pedals and are used for steering
Term
light gun
Definition
detects light and used to shoot targets
Term
dance pad
Definition
flat electronic device divided into panels that are pressed by user's feet
Term
motion-sensing game controllers
Definition
allow user to move a handheld device through the air
Term
wii remote
Definition
uses Bluetooth to communicate with it's console
Term
digital camera
Definition
a mobile device that allows users to take pictures and store them digitally
Term
what are the basic types of digital cameras
Definition
studio, field and point-and-shoot
Term
studio camera
Definition
stationary/used for professional studio work
Term
field camera
Definition
portable w/many lenses/attachments
Term
point-and-shoot camera
Definition
affordable/lightweight more geared towards the home/small business user
Term
image download
Definition
transfers a copy of digital image to a computer's hard disk
Term
what factors affect the quality of digital photos
Definition
resolution and # of bits stored in each pixel
Term
pixel
Definition
the smallest element in an electronic display
Term
resolution
Definition
# of horizontal/vertical pixels in a display device
Term
how does the number of bits stored in each pixel affect the photo quality
Definition
the more bits used to represent a pixel the more colors/shades of gray that can be represented
Term
ppi stands for
Definition
pixels per inch
Term
what do digital camera manufactures use ppi to represent
Definition
resolution
Term
optical resolution
Definition
actual photographed resolution
Term
enhanced resolution
Definition
instead of or in addition to optical resolution and is usually higher, too
Term
voice input
Definition
the process of entering input by speaking into a microphone
Term
voice recognition
Definition
the computer’s capability of distinguishing spoken words
Term
speech recognition is another term for
Definition
voice recognition
Term
audio input
Definition
the process of entering any sound into the computer
Term
what are the common types of audio input
Definition
speech, music, and sound effects
Term
music production software
Definition
allows users to record, compose, mix, and edit music and sounds
Term
video conference
Definition
a meeting between two or more geographically separated people
Term
digital video camera
Definition
records video as digital signals instead of analog signals and many can capture still frames/motion
Term
video capture card
Definition
converts analog video signal into a digital signal a computer can process
Term
what is a DV camera
Definition
a digital video camera
Term
web cam
Definition
a DV camera that enables a user to capture video/still images, email w/video attachments, add live images to instant IMs, broadcast live images over the internet and make video phone calls
Term
video telephone call
Definition
both parties see each other and communicate over the internet
Term
streaming cam
Definition
has the illusion of moving images because it sends a continual stream of still images
Term
source document
Definition
the original form of the data
Term
optical scanner
Definition
usually called a scanner is a light-sensing input device that reads printed text/graphics then translates the results into a form the computer can process
Term
what are the types of scanners
Definition
flatbed, pen, sheet-fed and drum
Term
flatbed scanner
Definition
like a copy machine the scanning mech passes under the item which is placed on a glass surface
Term
what types of items can a flatbed scanner scan
Definition
single-sheet documents, bound material, photos;some have trays for slides, transparencies/negatives
Term
pen or handheld scanner
Definition
move device over text to scan the transfer to computer and some connect to a smart phone
Term
what types of items can a pen or handheld scanner scan
Definition
any printed text
Term
sheet-fed scanner
Definition
item to scan is pulled into stationary scanning mech, smaller than a flatbed; a model specifically for photos is the photo scanner
Term
what types of items can a sheet-fed scanner scan
Definition
single-sheet documents, photos, slides (w/an adapter) and negatives
Term
drum scanner
Definition
item to scan rotates around stationary scanning mech, very expensive, geared toward large businesses
Term
what types of items can a drum scanner scan
Definition
single-sheet documents, photos, slides and negatives
Term
optical character recognition
Definition
involves reading characters from ordinary documents
Term
OCR stands for
Definition
optical character recognition
Term
image processing
Definition
consists of capturing, storing, analyzing, displaying, printing/manipulating images and allows users to converts paper documents into electronic images
Term
image processing system
Definition
similar to an electronic filing cabinet that provides access to exact copies of original documents
Term
optical reader
Definition
a device that uses a light source to read characters, marks and codes then converts them into digital data
Term
OCR devices include
Definition
small optical scanners and sophisticated software to analyze what is read
Term
turnaround document
Definition
a document you return to the company that creates and sends it
Term
what is OMR
Definition
reads hand-drawn marks such as small circles or rectangles
Term
what does OMR stand for
Definition
optical mark recognition
Term
what do OMR devices do
Definition
scan documents and match the patterns of light
Term
bar code reader or bar code scanner
Definition
uses laser beams to read bar codes
Term
bar code
Definition
id code consisting of a vertical set of lines/spaces varying in width or a 2-Dpattern w/dots,squares,other images
Term
what type of bar code does the United States Postal Service use
Definition
POSTNET
Term
what type of bar code do retail/grocery stores use
Definition
UPC
Term
what does UPC stand for
Definition
universal product code
Term
what does RFID stand for
Definition
radio frequency identification
Term
radio frequency identification
Definition
uses radio signals to communicate with a tag placed in or attached to an object
Term
what does and RFID reader do
Definition
reads information on the tag via radio waves
Term
what type of info can an RFID reader track
Definition
times, locations, objects, receipts, inventory, tire pressure/temp
Term
magnetic stripe card readers or magstripe readers
Definition
read the magnetic stripe on the back of cards like credit cards
Term
what does MICR stand for
Definition
magnetic ink character recognition
Term
magnetic ink character recognition devices
Definition
read text printed with magnetized ink like on checks from a bank
Term
what does an MICR reader do
Definition
convert MICR characters into a form the computer can process
Term
data collection devices
Definition
obtain data directly at location where transaction/event takes place like in restaurants,stores,factories,warehouses
Term
biometrics
Definition
the technology of authenticating a persons identity by verifying personal characteristics
Term
biometric identifier
Definition
a physiological or behavioral characteristic like fingerprint,voice,
signature,eye pattern/facial feature
Term
biometric device
Definition
translates a personal characteristic(input)to a digital code/compares it to stored digital code for verification
Term
what are the common types of biometric devices
Definition
fingerprint reader, hand geometry system, iris recognition system
Term
fingerprint reader
Definition
captures curves/indentations of prints to verify identity allowing access, or to perform a specific action
Term
face recognition system
Definition
captures a live face image/compares w/a stored image to determine liegitimate users
Term
hand geometry system
Definition
measures the shape/size of the hand
Term
voice verification system
Definition
compares live speech w/stored voice patterns
Term
signature verification system
Definition
recognizes the shape of a handwritten signature/measures the pressure/motion used while writing
Term
iris recognition system
Definition
uses iris recognition tech to read patterns in the iris of the eye which are as unique as a fingerprint
Term
retinal scanners
Definition
scan patterns of blood vessels in the back of the retina
Term
terminal
Definition
a computer that allows users to send data to and/or receive information from a host computer
Term
a POS terminal
Definition
point of sale terminal records purchases, processes payment and updates inventory
Term
an ATM
Definition
automated teller machine is a self-service banking machine
Term
a PIN
Definition
personal identification number is a password used to identify that a person is the cardholder
Term
a DVD kiosk
Definition
a self-service DVD rental machine
Term
the ADA
Definition
Americans w/ Disabilities Act requires companies w/15+ to make reasonable accomodations for disabled employees
Term
keygaurd
Definition
metal or plastic plate over keyboard that allows hands to rest w/out pressing keys
Term
on-screen keyboard
Definition
a graphic of a standard keyboard displayed on the screen
Term
head-mounted pointer
Definition
allows users w/limited hand movement to control the pointer/insertion point
Term
gesture recognition
Definition
detects human motions like sign language, facial movement, lip reading or following eye gazes
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