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Essential Intro. To Computers
COM8 - COM13
27
Computer Science
10th Grade
09/10/2007

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Cards

Term
Memory
Definition
RAM (Random Access Memory), consists of electronic components that temporarily store instructions waiting to be executed by the processor, data needed by those instructions, and the results of processed data.
Term
Kilobyte
Definition
Also known as KB, is equal to 1,000 bytes
Term
Megabyte
Definition
Also known as MB, is equal to 1,000,000 bytes
Term
Byte
Definition
One memory location or character
Term
Impact Printer
Definition
Prints by striking an inked ribbon against the paper, one example could be the dot-matrix printer
Term
Nonimpact Printer
Definition
This is when they print by other means than striking a ribbon against paper examples are ink-jet and laser.
Term
Ink-Jet Printer
Definition
Form characters or graphics by using a nozzle that sprays tiny drops of ink onto the page
Term
PPM
Definition
Numbers of pages per minute
Term
Laser Printer
Definition
High-speed, high-quality nonimpact printer that employs copier-machine technology. It converts data into a beam of light that is focused on a photo-conductor drum, forming the images to be printed.
Term
Display Device
Definition
An 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, the most popular type of flat panel monitor, uses a liquid display crystal to display images on the screen.
Term
CRT Monitors
Definition
Cathode ray tube, the surface of the screen in either is composed of pixels.
Term
Pixel
Definition
Individual picture element
Term
Storage Device
Definition
Used to store data when they are not 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
Sector
Definition
Pie-shaped sections, which breaks the tracks into smaller arcs.
Term
Two Types of Magnetic Disks
Definition
*Floppy

*Hard Disk
Term
Portable storage medium
Definition
You can carry a storage device to another computer
Term
Hard disk
Definition
Also called a hard disk drive, is 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 and results in loss of data or sometimes the entire drive.
Term
Backup
Definition
A duplicate of the file, program, or disk that you can use in case the original is lost, damaged, or destroyed.
Term
Floppy Disks
Definition
Inexpensive portable storage medium, the most widely used floppy disk is 3.5 inches wide and typically can store up to 1.44 MB of Data.
Term
Floppy Disk Drive
Definition
A device that can read from and write on a floppy disk, can be internal or external units
Term
Access Time
Definition
The time required to access and retrieve data.
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