Technology Vocabulary 2-2
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impact printers
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printers that have tiny hammer-like keys that strike the paper through in inked ribbon, thus making a mark on the paper. The most common type of impact printer is a dot matrix printer
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inkjet printers
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a nonimpact printer that sprays tiny drops of ink onto paper
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input devices
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hardware device used to enter, or input, data (text, images, and sounds) and instructions (user responses and commands) into a computer; input devices can include keyboards, mice, scanners, microphones and digital cameras
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keyboard
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used to enter typed data and commands into a computer
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laser printers
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a nonimpact printer known for quick and quiet productions and high quality printouts
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liquid crystal display (LCD)
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technology used in flat panel computer monitors
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microphones
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a device for capturing sound waves (such as voice) and converts it to an electrical signal
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modem card
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a device that provides the computer with a connection to the internet via conventional telephone lines
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modem port
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a port that uses traditional telephone signal to connect a computer to the Internet
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monitor
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a common output device that displays text, graphics, and videos as \"soft copies\" (copies that can be seen on the screen only)
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motherboard
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a special circuit board in the system unit that contains the central processing unit (CPU), the memory (RAM) chips, and the slots available for expansion cards. It is the largest printed circuit board of all the other boards (video cards, sound cards, and so on) connect to it to receive power and to communicate
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mouse
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a device used to enter responses and commands into the computer
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multifunction printer
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a device that combines the functions of a printer, scanner, fax machine and copier into one machine
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network interface card (NIC)
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an expansion card that allows a computer to connect with a network
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nonimpact printers
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printers that spray ink or use laser beams to make marks on the paper. The most common nonimpact printers are ink jet and laser printers
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nonvolatile storage
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permanent storage, as in read only memory (ROM)
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numeric keyboard
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section of the keyboard that allows a user to enter numbers quickly
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optical mouse
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a mouse that uses an internal sensor or laser to control the mouses movements. The sensor sends signals to the computer telling it where to move the pointer on the screen
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output devices
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a device that sends processed data and information our of a computer in the form of text, text,pictures, sounds or video
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parallel port
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a port that sends data between devices in groups of bits at 92 Kilobits per second (Kbps). Parallel ports were commonly used to connect printers to computers
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passive-matrix displays
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computer monitor technology in which electrical current passes though a liquid crystal solution and charges groups of pixels, either in a row or column. This causes the screen to brighten with each pass of electrical current and subsequently to fade.
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peripheral devices
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devices such as monitors, printers or keyboards that connect to the system unit though ports
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pixels
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illuminated, tiny dots that create the images you see on a computer monitor. Pixels are illuminated by an electron beam that passes back and forth across the back of the screen very quickly so that the pixels appear to glow continuously
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plotters
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large printers that use a computer controlled pen to produce oversize pictures that require precise continuous lines to be drawn, such as in maps or architectural plans
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ports
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an interface through which external devices are connected to the computer
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power supply
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used to regulate the wall voltage to the voltages required by computer chips; it is housed inside the system unit
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printer
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a common output device that creates tangible hard copies of text and graphics
