module 6# Flashcards
study
A command
is an instruction that causes a program or app to perform a specific action.
A user response
is an instruction a user issues by responding to a message displayed by a program or app.
Function keys
which are labeled with the letter F followed by a number, are special keys programmed to issue commands to a computer.
A Toggle key
is a key that will alternate views or turn a feature on or off each time you press it. Caps Lock and Num Lock are examples of toggle keys
QR code (quick response code), or a 2-D bar code,
stores information in both a vertical and horizontal direction in a square-shaped graphic that represents a web address or other content.
RFID (radio frequency identification)
is a technology that uses radio signals to communicate with a tag placed on or attached to an object, an animal, or a person.
magstripe reader
short for a magnetic stripe card reader, reads the magnetic stripe on the back of credit cards, entertainment cards, bank cards, identification cards, and other similar cards.
MICR (magnetic-ink character recognition)
device reads text printed with magnetized ink. MICR reader converts MICR characters into a form the computer can process.
A non-impact printer
forms characters and graphics on a piece of paper without actually contacting the paper. by pressure, heat, sprayed ink
A plotter
is a sophisticated printer used to produce high-quality drawings, such as blueprints, maps, and circuit diagrams.
An LCD (liquid crystal display)
sandwiches a liquid compound between two sheets of material that presents sharp, flicker-free images on a screen when illuminated.
A graphics chip, called the graphics processing unit (GPU)
controls the manipulation and display of graphics on a display device.
