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American Stanard Code for Information Interchange


Anything that has only two states such as on/off or yes/no

Binary code

A coding system that relies on the use of bits-0s and 1s-to encode

Binary digit

Either character used in the binary number system,so a 0 or a 1


A binary digit, a 0 or a 1


A grouping of eight adjacent binary digits or bits,0s and 1s,operated on by the computer as a single unit


A single letter, digit, or special symbol such as ?,#,or *


An intergrated circuit.A thin piece of silicon that contains all the components of an electronic


A device used to accept, process, store, and get information

Digital Information

Information that can be expressed in a numerical form. the computer uses the binary number system for this purpose so 0s and 1s are used to express all the information entered into the computer

Disk Drive

The device used to store data on a disk and to read what is stored on this disk

Expansion Slot

A connector inside a computer designed to allowa user to add

Floppy Disk

A reuseable magnetic storage medium that uses a thin mylar circular disk as a storage surface


To prepare a disk so that data is stored on it by a particular computer system


One billion bytes (or chartecters)


Pictures or illustrations on a page

Hard Copy

Outputthat is printed on paper

Hard Disk

A rigid disk, usually metal, encased in a hard disk dri~ or in a plastic case or cartridge


The physical parts that make up a computer system-for example,keyboards,printers ,monitors, and so on


The stepin the data processing flow during which data is collected and entered into the computer

Intergrated circuit

Circuitry whose parts are etched together on a small silicon chip less than one-forth of an inch square


Aninput device that usually has keys like those on a typewriter


1,024 storage unit (1,024 bytes) often rounded to 1,000;a measure of computer memory


One million byte (or characters)


A measure of speed,one million cycles per second


A place to store information;usually coded in a binary format;see RAM,ROM


The main processing unit of a computer or information processing device;the "brains" of the machine carrying out instructions,preforming calculations,and interacting with components use to operate the computer.Handles the fetch,decode and execute steps of the computer


A computer output device that uses a display screen to present the processed information


The main circuit board of a computer housing the microprocessor and providing the means of connecting all the components that make up the computer


A computer input device used as a pointing and drawing instrument by selecting specific positons on the monitor display


The computer generated information that is displayed to the user in some discernible from such as a screen display,printed page,or sound

Peripheral device

A device that is attached to the computer and aids in inputs and/or output


An individual copy of light on a display screen that can be lit by a programming command

Primary storage

The computer`s immediate internal memory,RAM and ROM


A machine that prints characters or other images on paper


The second step of data processing flow in which the computer acts on data


A set of step-by-step instructions that tell a computer how to do a certain task


Random Access Memory


Read Only Memory


A macine that changes images from paper or photos to digital form the computer can use

Seconadry storage

All storage materials other than primary memory

Silicon chip

A small piece of sillicon on which crcuitsw are etched

Soft copy

A temporary display of output seen on a monitor


Programs,or instructions,that tell a compuer exactly what to do


A solid device that controls electric current flows without using a vacuume tube

Vacuum tube

Glass bulbs like light bulbs that electricity passes through. They can be found in old radios and TVs.

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