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Byte

Byte
In computing a byte is the basic unit of storage. A byte is a logical collection of 8 binary bits. A byte can therefore store a single integer value from 0 to 255. Collections of bytes can store larger number ranges or be used to represent other forms of data.

Half a byte is a nibble, other common names given to collections of bytes are:

Name Number of bytes
nibble 2-1 0.5
byte 20 1
word 21 or 22 2 or 4
dword 22 4
kilobyte 210 1024
megabyte 220 1,048,576
gigabyte 230 1,073,741,824
terabyte 240 1,099,511,627,776
petabyte 250 1,125,899,906,842,624
exabyte 260 1,152,921,504,606,846,976
zettabyte 270 1,180,591,620,717,411,303,424
yottabyte 280 1,208,925,819,614,629,174,706,176