Computer - Memory Units
It is the amount of data that can be stored in the storage unit.
The storage capacity are expressed in terms of Bytes.
Following are the main memory storage units:
|1||Bit (Binary Digit)||A binary digit is logical 0 & 1 representing a passive or an active state of a component in an electric circuit.|
|2||Nibble||A group of 4 bits is called nibble.|
|3||Byte||A group of 8 bits is called byte. A byte is the smallest unit, which can represent a data item or a character.|
|4||Word||A computer word like a byte, is a group of fixed number of bits processed as a unit which varies from computer to computer but is fixed for each computer. |
The length of a computer word is called word-size or word length and it may be as small as 8 bits or may be as long as 96 bits.
A computer stores the information in the form of the computer words.
Few higher storage units are the following:
|1||Kilobyte (KB)||1 KB = 1024 Bytes|
|1||Megabyte (MB)||1 MB = 1024 KB|
|1||GigaByte (GB)||1 GB = 1024 MB|
|1||TeraByte (TB)||1 TB = 1024 GB|
|1||PetaByte (PB)||1 PB = 1024 TB|