Shared Flashcard Set

Details

Essential Intro. To Computers
pgs COM8 - COM 13
24
Computer Science
10th Grade
09/10/2007

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Cards

Term
Memory
Definition
Consist of electronic component that temporarily store instructions waiting to be executed by the processor, data needed by those instructions, and the results of the processed data. (also called random access memory, or RAM)
Term
Kilobyte (K or KB)
Definition
Equals approximately 1,000 bytes.
Term
Megabyte (MB)
Definition
Equals 1,000,000 bytes
Term
Byte
Definition
One memory location, or one character
Term
Impact printer
Definition
Prints by striking an ink ribbon against the printer. One type of impact printer is the dot-matrix printer.
Term
Nonimpact printer
Definition
Print by means other than striking a ribbon against paper. Examples include ink-jet and laser.
Term
Ink-jet
Definition
Form characters or graphics by using a nozzle that sprays tiny drops of ink onto the page.
Term
Laser printer
Definition
High-speed, high-quality nonimpact printer that employs copier-machine technology. It converts data from the computer into a beam of light that is focused on a photoconductor drum, forming the images to be printed.
Term
PPM
Definition
Stands for numbers of pages per minute.
Term
Display device
Definition
And output device that visually conveys text, graphics, and video information.
Term
Monitor
Definition
A display device that is packaged as a separate unit.
Term
Flat panel monitor
Definition
An LCD monitor that is the most popular type of flat panel monitor that uses a liquid display crystal, similar to a digital watch, to produce images on the screen.
Term
CRT
Definition
Stands for cathode ray tube. The surface of the screen is composed of pixels
Term
Pixel
Definition
Individual picture element.
Term
Storage devices
Definition
Used to store instructions, data, and information when they are not being used in memory.
Term
Magnetic disks
Definition
Use magnetic particles to store items such as data, instructions, and information on a disk's surface.
Term
Formatting
Definition
The process of dividing the disk into tracks and sectors so the computer can locate the data, instructions, and information on the disk.
Term
Track
Definition
A narrow recording band that forms a full circle on the surface of the disk.
Term
Hard disk
Definition
A storage device that contains one or more inflexible, circular platters that magnetically store data, instructions, and information.
Term
Head crash
Definition
When a read/write head touches a platter, usually resulting in the loss of data or sometimes the entire drive.
Term
Backup
Definition
Duplicate of a file, program, or disk that you can use in case the original is lost, damaged, or destroyed.
Term
Floppy disk
Definition
Inexpensive portable storage medium. The most widely used floppy disk is 3.5 inches wide and can typically store up to 1.44 megabytes of data, or 1,474,560 characters. (also called diskettes)
Term
Floppy disk drive
Definition
A device that can read from and write on a floppy disk. Floppy disk drives are either built into the system unit or are external to the system unit and connected to the computer via a cable.
Term
Access time
Definition
The time required to access and retrieve data.
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