Computer term : Glossary

CPU (Central processing unit)

The CPU is the part of a

computer that is

commonly referred to

as the “brain” because

it process everything in

a computer.

RAM (Random access memory)

RAM is a type data storage

that allow files to be written

and read at a short notice. Also

RAM allows your PC immediate

access to data it requires

ROM (Read only memory)

ROM is memory chip that

cannot have it data

removed. Unlike RAM, ROM

retains its contents even when

the computer when the

computer is turned off.

Cache

Cache is a component that

stores data can be severed

faster. The data stored in a

cache might be the result of an

earlier computation.

Hard drive

Storage is the hard

drive’s responsibility.

Everything you keep on

your computer is on a

hard drive.

Motherboard

The motherboard itself is a

printed circuit board that

allow the CPU, RAM, and all

other computer hardware

components to

communication with each

other.

Powering unit

A power supply unit

converts main AC to low

voltage regulated DC

power for the internal

components of a

computer.

Video card

A video card connects

to be the motherboard

of a computer system

and generates output

images to display. Video

cards are also referred

to as graphics cards.

Sound card

A sound card is an internal

computer expansion card

that facilitates economical

input and output of audio

signals to and from a

computer under control of

computer programs.

Speed measurement

Kilohertz

Megahertz

Gigahertz

Electromagnetic radiation is often

described by its frequency – the number

of oscillations of the perpendicular

electric and magnetic fields per second

– expressed in hertz. Radio frequency

radiation is usually measured in kilohertz

(kHz), megahertz (MHz), or gigahertz

(GHz).

Storage measurement Megabytes

Gigabytes

Terabytes

Byte

Bit

Kilobyte

Kilobit

In computer and telecommunications, a unit of

information is the capacity of some standard data

storage system or communication channel, used to

measure the capacitates of other systems and

channels. In information theory, units of information

are also used to measure the information contents

or entropy of random variables.

USB (Universal serial bus)

USB is an industry standard

developed in the mid 1990s

that define cable, connectors

and communication protocols

used in a bud for connection,

communication, and power

supply between computers and

electronic devices.

VGA (Video Graphic Array)

VGA refers specifically to the display hardware

first introduces with the IBM PS/2 line of

computers in 1987, but through its widespread

adoption has also come to mean either an

Amplitude Modulated computer display

standard, the 15 – pin D – subminiature VGA

connector or the 640x480 resolution itself

HDMI (High – Definition

Multimedia Interface)

HDMI is a proprietary audio/video

interface for transferring

uncompressed video data and

compressed or uncompressed

digital audio data from an HDMI –

compliant source device, such as

display controller, to a compatible

computer monitor, video projector,

digital television, and etc.

DVI (Digital visual

interface)

DVI is a video display

interface developed by the

Digital Display working

Group (DDWG). The digital

interface is used to connect

a video source, such as a

display controller to a

display device, such as a

computer monitor.

Audio Jack

Audio jacks are found on

many types of audio

equipment and musical

instruments that accept

external sound sources. In a

car or truck, ab audio jack,

also called a “media jack” or

“auxiliary (AUX) jack,” is a

mini-phone socket that

connects any portable music

player to the vehicle's

amplifier and speakers.

Ethernet cable

Ethernet cables connect your

computer to your internet modem.

They are usually 6 feet long and

come in an assortment of colors.

Wi-Fi Adapter

Wi-Fi Adapter is a product that

let your computer to connect

to a local Wi-Fi network . It

would broadcast a signal

which local devices can pick

up and relay.

Bluetooth

Transfer Files Wirelessly Between

Mobile Devices and Computers.

You can pair a smartphone or

tablet and a laptop or Bluetooth

enabled PC together and use

Bluetooth to wirelessly send files

back and forth.

Printer: In computers, a printer is a device

that accepts text and graphic output from a

computer and transfers the information to

paper, usually to standard size sheets of

paper.

Monitor: A monitor usually comprises

the display device, circuitry, casing,

and power supply.

Scanner: A scanner is a device that

captures images from photographic

prints, posters, magazine pages, and

similar sources for computer editing

and display.

Keyboard: In computing, a

computer keyboard is a typewriter-style

device which uses an arrangement of

buttons or keys to act as a mechanical

lever or electronic switch.

Mouse: A computer mouse is a pointing

device (hand control) that detects two-

dimensional motion relative to a surface. This

motion is typically translated into the motion

of a pointer on a display, which allows for a

fine control of the graphical user interface.

Speaker: Speaker is a device that let you

translate electrical signal from your

computer into sound or music.

USB flash drive: USB flash drives are often used

for the same purposes for which floppy disks or

CDs were once used, i.e., for storage, data

back-up and transfer of computer files.