Computer Class 4
Some external peripherals such as an external modem, speakers, or a tape drive have an AC _____, which is an external power supply.
The first step in cleaning a computer is _____.
turn it off, unplug it, and unplug all cables from the ports.
A user response is _____.
an instruction issued by replying to a question that is displayed
A ____ is an output device that contains keys users press to enter data into a computer.
____, such as those shown on the keyboard in the accompanying figure, are special keys programmed to issue commands to a computer.
Nearly all keyboards, such as that shown in the accompanying figure, have a ____that switches between two states each time a user presses the key.
The ___ is a symbol on the screen, usually a blinking verical bar, that indicates where the next character typed will display.
A ___ keyboard usually contains programmable keys so users can customize the keyboard to the game being played.
To fit in notebook and many handheld computers, the keyboards usually are ____.
smaller and have fewer keys
In contrast to most desktop computers, a typical notebook computer usually has about ____ keys.
A ____ device is an input device that allows a user to control a pointer on the screen.
A _____, such as that shown in the accompanying figure, is a pointing device that fits comfortably under the palm of the hand.
A newer typr of the kind of device shown in the accompanying figure is a _____ mouse, which is motion-sensing.
A _____ mouse, like the one shown in the accompanying figure, uses device that emit and sense light to detect movement.
Similar to a mechanical mouse that has a ball on the bottom, a ______ is a stationary pointing device with a ball on its top or side.
A ____ is a touch-sensative display device that users interact with by touching the screen with a finger.
A ___ is a small metal or plastic device that looks like a tiny ink pen but uses pressure instead of ink.
A dance ____ is a flat electronic device divided into panels that users press with their feet in response to instructions from a music video game.
The most expensive and highest quality version of the technology shown in the accompanying figure is a _____.
A ____ is a more affordable and lightweight version of the technology shown in the accompanying figure and provides acceptable photographic images for the home or small buisness user.
Manufactures often use _____ to represent the resolution of a digital camera like the one shown in the accompanying figure.
pixels per inch (ppi)
The actual photographed resolution of a digital camera like the one shown in the accompanying figure is known as the ____.
A _____ camera allows users to take pictures and store the photographed images digitally, instead of on traditional film.
Voice _____ is the process of entering data by speaking into a microphone.
Voice ____ is the computer's capability of distinguishing spoken words.
Music ____software allows users to record, compose, mix and edit music and sounds.
Video ____ is the process of capturing full-motion images into a computer and storing them on storage medium such as a hard disk or DVD.
A ____ camera records video as digital signals instead of analog signals.
During a ____telephone call, both parties see eachother as they communicate over the Internet.
A ___ is another window on the screen during a video conference that displays notes and drawings simultaneously on all participants screens.
A ____ conference is a meeting between two or more geographically seperated people who use a network or the Internet to transmit audio and video data.
A ___ is similar to an electronic filing cabinet that provides access to exact reproductions of the original documents.
image processing system
A ___ scanner works in a manner similar to a copy machine except it creates a file of the document in memory instead of a paper copy.
Many scanners include ____ software, which can read and convert text documents into electronic files.
Most ____ devices include a small optical scanner for reading characters and sophisticated software to analyze what is read.
Many companies use OCR characters on a ____ document, which is a document that is returned to the company that creates and sends it.
Retail and grocery stores use the ____ bar code.
UPC (Universal Product Code)
A ____ reader reads the magical stripe on the bank of credit cards, entertainment cards, bank cards, and other similar cards.
____ devices read text with magnetized ink.
A ____ identifier is a physiological or behavioral characteristic such as fingerprints, hand geometry, facial features, voice, signatures, and eye patterns.