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Computers store and process vast amounts of data, measured in units that range from individual bits to petabytes and beyond. This lesson covers the standard units used to measure data storage and how to convert between them.
The bit is the smallest unit of data in computing. It stores a single binary value: 0 or 1.
The word "bit" is short for binary digit.
On its own, a single bit can represent only two values (0 or 1), but when combined with other bits, it can represent much more complex data.
A nibble is a group of 4 bits. It can represent 2⁴ = 16 different values (0–15 in denary, or 0–F in hexadecimal).
A nibble corresponds to exactly one hexadecimal digit, which is why nibbles are useful when working with hex.
A byte is a group of 8 bits (or 2 nibbles). It is the standard unit of data storage and is the smallest addressable unit in most computer systems.
A byte can represent 2⁸ = 256 different values (0–255 in unsigned binary).
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