Bit, Byte, KB, MB, GB etc...

Computer Data Memory Units Explained in Detail

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Definition

What is Computer Data Units ?

Computer Data unit is a unit for measuring computer

memory.

Memory

Kinds Of Memory…

Computer Data unit is a unit for measuring computer

memory.

Memory

Storage Devices use the unit of memory card…

What is bit ?

Most important part in system.

• First we know about what is bit.

• Computer circuit need power of electricity.

• Electricity power mode On and Off

• The on and Off is Bit in electricity.

• Because the computer are store the data in form off electricity.

• In Electricity also called bit.

• Only two value in bit 0 and 1 mean on and off.

What is Nibble ?

This not import unit in computer.

Nibble Storage Unit

Half a byte (four bits) is called a nibble.

What is Byte?

This is import unit in computer.

Byte Storage unit

In Computer System are all information mention in

byte format data display on screen.

Bit or Byte both are different form.

1 Byte = 8bits.

A byte is the unit most computers use to represent a character such as a letter,

number or typographic symbol.

for example, “g”, “5”, or “?”

Confusion

Sign

Which is bit and Byte.

b = bit

B = Byte

1024 * 1024 = 2048

2048/8 = 256

2Mb/s = 256 KB/s

Octet

This not import unit in computer.

Which is bit and Byte.

in some systems, the term octet is used for an

eight-bit unit instead of byte.

In many systems, four eight-bit bytes or octets form a 32-bit word.

In such systems, instructions lengths are sometimes expressed as

full-word (32 bits in length) or half-word (16 bits in length).

Kilobyte

1024 bytes = 1 KB

Note

A Kilobyte (kb or Kbyte) is approximately a thousand bytes

(actually, 2 to the 10th power, or decimal 1,024 bytes).

Megabyte

1024 kilobyte= 1 MB

Note

As a measure of computer processor storage and real and virtual me

mory, a megabyte (abbreviated MB) is 2 to the 20th power byte,

or 1,048,576 bytes in decimal notation.

Gigabyte

1024 Megabyte= 1 GB

Note

A Gigabyte (pronounced Gig-a-bite with hard G’s) is a measure of co

mputer data storage capacity and is “roughly” a billion bytes. A gigab

yte is two to the 30th power, or 1,073,741,824 in decimal notation.

Terabyte

1024 Gigabyte= 1 TB

Note

A Terabyte is a measure of computer storage capacity and is 2 to the

40th power of 1024 gigabytes.

Petabyte

1024 Terabyte= 1 PB

Note

A Petabyte (PB) is a measure of memory or storage capacity and is 2

to the 50th power bytes or, in decimal, approximately a thousand

terabytes (1024 terabytes).

Exabyte

1024 Petabyte= 1 EB

Note

An Exabyte (EB) is a large unit of computer data storage, two to the

sixtieth power bytes. The prefix exa means one billion billion, or on

quintillion, which is a decimal term. Two to the sixtieth power is

actually 1,152,921,504,606,846,976 bytes in decimal, or somewhat

over a quintillion (or ten to the eighteenth power) bytes. It is

common to say that an Exabyte is approximately one quintillion

bytes. In decimal terms, an Exabyte is a billion gigabytes.

Zettabyte

1024 Exabyte= 1 ZB

Note

A Zettabyte (ZB) is equal to one sextillion bytes. It is commo

nly abbreviated ZB. At this time, no computer has one Zettab

yte of storage. It has 1024 Exabytes.

Yottabyte

1024 Zettabyte= 1 YB

Note

A Yottabyte is equal to one septillion bytes. It is commonly a

bbreviated YB. At this time, no computer has one Zettabyte

of storage. It has 1024 Zettabytes.