Memory unit is:
- the amount of data that can be stored in the storage unit.
- that in which storage capacity is expressed in terms of Bytes.
Following are the main memory storage units:
| Sr.No. |
Unit |
Description |
| 1 |
Bit (Binary Digit) |
A binary digit is logical 0 and 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 computer words. |
Few higher storage units are following
| Sr.No. |
Unit |
Description |
| 1 |
Kilobyte (KB) |
1 KB = 1024 Bytes |
| 2 |
Megabyte (MB) |
1 MB = 1024 KB |
| 3 |
GigaByte (GB) |
1 GB = 1024 MB |
| 4 |
TeraByte (TB |
1 TB = 1024 GB |
| 5 |
PetaByte (PB) |
1 PB = 1024 TB |
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