Memory unit is the amount of data that can be stored in the storage unit. This storage capacity is expressed in terms of Bytes. The storage capacity of the memory is expressed in various units of memory.
These are as follows:
Bit (Binary Digit)-
The computer memory units start from bit. A bit is the smallest memory unit to measure data stored in main memory and storage devices. A binary digit is logical 0 and 1 representing a passive or an active state of a component in an electric circuit.
Nibble-
A collection or group of 4 bits is called Nibble.
Byte-
A group of 8 bits is called byte. a byte is a unit that expresses any word, symbol, or character in the computer language. Besides, computer memory is always in terms of multiples of bytes.
Kilobyte-
- The abbreviation for kilobytes is ‘KB’.
- It is the most common unit of memory which is the smallest of all. But, it is greater than the byte.
- It contains 1000 bytes. Besides, it is synonyms to kibibytes which contain 1024 (2^10) bytes.
Megabyte-
- The abbreviation for megabyte is ‘MB’.
- It contains 1000,000 bytes. Besides, it is synonyms to mebibytes which contains 1048576 (2^20) bytes.
Gigabyte-
- The abbreviation for the gigabyte is ‘GB’
- It contains 1000,000,000 bytes. Besides, it is synonyms to gibibytes which contain 1073741824 (2^30) bytes.
Terabyte-
- The abbreviation for terabytes is ‘TB’.
- It contains one trillion bytes. Besides, it is synonyms to tebibytes which contains 2^40 bytes.
Petabyte-
- The abbreviation for petabyte is ‘PB’.
- It contains 10^15 bytes. Besides, it is synonyms to pebibytes which contains 2^50 bytes.
- Petabytes usually measure the total data storage in large networks or server farms. For example, the data in Google or Facebook data servers is around more than 10 PBs.
Exabyte-
- The abbreviation for exabyte is ‘EB’.
- It contains 10^18 bytes. Besides, it is synonyms to exbibytes which contains 2^60 bytes.
- The exabyte unit is so large that it does not even measure the storage of large cloud servers. Rather, it can be used to measure the amount of data transfer over the internet for a certain time limit.
Zettabyte-
- The abbreviation for zettabyte is ‘ZB’.
- It contains 10^21 bytes. Besides, it is synonyms to zebibytes which contains 2^70 bytes.
- It can measure a huge amount of data. In fact, the whole data in the world is just a few zettabytes.
Yottabyte-
- The abbreviation for yottabyte is ‘YB’.
- It contains 10^24 zettabytes. Besides, it is synonyms to yobibytes which contains 2^80 bytes.
- It is a tremendously huge unit of measurement. Therefore, it has no practical use.
| S.No. | Units Description |
| 1 | 1 Bit= Binary Digit (0 and 1) |
| 2 | 1 Byte = 8 bits 1 Byte = 2 Nibble |
| 3 | Kilobyte (KB) 1 KB = 1024 Bytes |
| 4 | Megabyte (MB) 1 MB = 1024 KB |
| 5 | GigaByte (GB) 1 GB = 1024 MB |
| 6 | TeraByte (TB) 1 TB = 1024 GB |
| 7 | PetaByte (PB) 1 PB = 1024 TB |
| 8 | ExaByte (EB) 1 EB = 1024 PB |
| 9 | ZetaByte (ZB) 1 ZB = 1024 EB |
| 10 | YotaByte (YB) 1 YB = 1024 ZB |
| 11 | BrontoByte (BB) 1 BB = 1024 YB |
| 12 | GeopByte 1 GeopByte = 1024 BrontoByte |