Memory unit is a term used to describe memory. (There will always be a unit to measure something)
Bit
Bit stands for Binary Digit. It is the smallest unit of data that can be stored by a computer. Each bit is represented by binary number 0 and1.
Nibble
A nibble is four bits or half of a byte. For example, the decimal value of 10 in an 8-bit byte is 00001010 that same value in a 4-bit nibble is 1010. It is also called nyble or nibble.
Byte
A byte contains 8 bits. A single keyboard character that you type such as the letter A or symbol π takes up one bit of storage.
1 Bit
0 OR 1
4 Bits
1 Nibble
8 Bits
1 Byte
1024 Bytes
1 KB [Kilo Byte]
1024 KB
1 MB [Mega Byte]
1024 MB
1 GB [Giga Byte]
1024 GB
1 TB [Terra Byte]
1024 TB
1 PB [Peta Byte]
1024 PB
1 EB [Exa Byte]
1024 EB
1 ZB [Zetta Byte]
1024 ZB
1 YB [Yotta Byte]
1024 YB
1 Bronto Byte
1024 Brontobyte
1 Geop Byte
Note: Geop Byte is the highest memory today.