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Essential Intro. To Computers
pgs. Com8-Com13
25
Computer Science
10th Grade
09/10/2007

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Term
Memory
Definition
Also called random access memory, or RAM 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 (Information).
Term
Kilobyte
Definition
Equals approximately 1,000 memory locations
Term
Megabyte
Definition
Equals approximately one million memory locations.
Term
Gigabyte
Definition
Equals approximately on billion memory locations
Term
Memory Location/Byte
Definition
Usually stores one character such as the letter A
Term
Extra notes
Definition
Memory consists of chips on a memory module that fits in a slot on the motherboard in the system unit
Term
Printers
Impact printer
Definition
Prints by striking an inked ribbon against the paper, one type of impact printer used with personal computers is the dot-matrix printer.
Term
Nonimpact printers
Definition
such as ink-jet printers and laser printers, form characters by means other than striking a ribbon against paper. Ink drop printers forms a character or graphic by using a nozzle that sprays tiny drops of ink onto the page. Laser printer is a 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
PPM
Definition
Number of pages per minute
Term
Display devices
Definition
Is an output device that visually conveys text, graphics, and video information.
Term
Monitor
Definition
A display device that is packaged as a separate unit. Two basic types of monitors are the flat panel monitor and CRT. The LCD monitor, the most popular type of flat panel monitor, uses a liquid display crystal, similar to a digital watch to produce images on the screen. And The CRT (Cathode ray tube) monitor, the surface of the screen of either a CRT monitor or LCD monitor is composed of individual picture elements called pixels.
Term
LCD Monitor
Definition
The LCD monitor, the most popular type of flat panel monitor, uses a liquid display crystal, similar to a digital watch to produce images on the screen.
Term
CRT monitor
Definition
And The CRT (Cathode ray tube) monitor, the surface of the screen of either a CRT monitor or LCD monitor is composed of individual picture elements called pixels.
Term
Pixels
Definition
Individual Picture elements
Term
Storage Devices
Definition
This is used to store instructions, data, and information when they are not being used in memory. Four common types of storage devices, sometimes called storage media, are magnetic disks, optical discs, tape, and miniature mobile.
Term
Magnetic disks
Definition
Use magnetic particles to store items such as data, instructions, and information on a disk`s surface
Term
Formatting
Definition
Is the process of dividing the disk into tracks and sectors, so the computer can locate the data, instructions, and information on the disk.
Term
A track
Definition
Is a narrow recording band that forms a full circle on the surface of the disk
Term
Sectors
Definition
The disk`s storage locations consist of pie -shaped sections that break the tracks into small arcs called sectors.
Term
Portable Storage medium
Definition
Means you can remove the medium from one computer and carry it to another computer.
Term
Hard disks
Definition
A hard disk, 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 touchs a platter, usually resulting in a loss of data or sometimes the 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
Definition
Another older form of magnetic storage is the floppy disk, or diskette, an inexpensive portable storage medium
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
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