What is byte ?
A byte is a unit of measure for digital information. A single byte
contains eight consecutive bits, and is capable of storing a single ASCII
character.

- What do you mean by ASCII ?

American Standard Code for Information Interchange. Standard 8 bit code used in data communications. Many files interchanged from one software program to another and from IBM to Mac formats go through translation into ASCII.

1 Kilo-Byte : 8 bits
A kilobyte (KB) is 1,024 bytes.
Mega-Byte : 1 MB = 1024 KB
Giga-Byte : 1 GB = 1024 MB
Tera-Byte : 1 TB = 1024 GB
Peta-Byte : 1 PB = 1024 TB
Exa-Byte : 1 EB = 1024 PB
Zentta-Byte : 1 Zb = 1024 EB
Yotta-Byte : 1 YB = 1024 ZB

Unit Equivalent
1 kilobyte (KB) 1,024 bytes
1 megabyte (MB) 1,048,576 bytes
1 gigabyte (GB) 1,073,741,824 bytes
1 terabyte (TB) 1,099,511,627,776 bytes
1 petabyte (PB) 1,125,899,906,842,624 bytes