Key Terms from Chapter 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Arithmetic Logic Unit (ALU) | the sector of the CPU that performs the mathematical calculations that are required in many data processing programs
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| Cache | provides a temporary storage area that provides a quick access to information
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| CRT (Cathode Ray Tube) | a type of technology used in monitors
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| Pixel | a single colored square on the screen - when joined, the image can be viewed
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| Hard Copy | a readable, permanent copy that a printer outputs after the data has been processed
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| Lumens | how the brightness of the projector is measured
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| Document Cameras | display slides, transparencies, text, documents, 3D objects, and microscopic objects
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| External Hard Disk Drives | are connected to a computer through cables and allow large quantities of data to be moved from one physical location to another
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| CD-R (compact disk - recordable) | allows the used to record data once for storage purposes; after information is recorded in cannot be edited
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| Ethernet port | used for high-speed connection to the Internet or another network, such as an intranet, or internal network
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| Application Software | allows the computer to carry out specific functions, such as word processing, creation of databases and spreadsheets, etc.
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| Instructional Software | presents content in tutorial, simulation, instructional game, problem solving, and drill-and-practice forms
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| Alternative Labels | taped or glues to tops of frequently used keys on the standard keyboard. They can be a different color to add visual clarity, or have raised letters to provide tactile feedback to someone using the keys
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| PAC Mate | a PDA designed for blind or low-vision users
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| Electronic Pointing Devices | all the user to control the cursor using ultrasound, an infrared beam, eye movements, nerve signals, or even brain waves
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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