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Essential Intro. to Computers
COM8 - COM13
26
Computer Science
10th Grade
09/10/2007

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Cards

Term
Memory
Definition
Random access memory (RAM) This consist 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
Kilobytes (K or KB)
Definition
Equals 1000 bytes.
Term
Kilobytes (K or KB)
Definition
Equals 1000 bytes.
Term
Megabyte (MB)
Definition
Equals one million bytes.
Term
Byte (Memory location)
Definition
Carries one character (letter).
Term
Impact Printer
Definition
These write by striking an inked ribbon against the paper. One type of and impact printer is a dot-matrix printer.
Term
Impact Printer
Definition
These write by striking an inked ribbon against the paper. One type of and impact printer is a dot-matrix printer.
Term
Non-impact Printer
Definition
This is when they print by means other than striking a ribbon against paper. Examples include ink-jet and laser. Ink- jets form characters or graphics by using a nozzle that sprays tiny drops onto the page.
Term
PPM
Definition
The number of pages a printer can print per minute.
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 photo-conductor drum, forming the images to be printed.
Term
Display devices
Definition
They are output devices that convey texts, graphics and video information.
Term
Monitor
Definition
A display device that is packaged as a separate unit.
Term
Flat-panel Monitor
Definition
LSD. More popular than an CRT monitor. The surface of the screen is composed of pixels.
Term
CRT
Definition
Cathode ray tube. The surface of the screen is composed of pixels.
Term
Pixel
Definition
This is an individual picture element.
Term
Storage device
Definition
Storage devices are used to store instructions, data, and information when they are not being used in memory.
Term
Magnetic Disks
Definition
Magnetic disks use magnetic particles to store items such as data, instructions, and information on a disks 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 disks
Term
Track
Definition
A track is a narrow recording band that forms a full circle on the surface of the disk
Term
Sector
Definition
Pie shaped sections which break tracks into small arks.
Term
Hard disk
Definition
A storage device that contains one or more inflexible, circular platters that magnetically store data, instructions and information.
Term
Floppy disk
Definition
(Diskette) an inexpensive portable storage medium. The most widely use floppy disk is 3.5 inches wide and can store up to 1.4 megabyte of data.
Term
Head crash
Definition
When a read/write head touches a platter, usually resulting in a loss of data or sometimes an entire drive.
Term
Backup
Definition
A duplicate of a file, program or disk that you can use in case the original is lost, damaged or destroyed.
Term
Floppy disk drive
Definition
A device that can read form and write on 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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