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A bit is a binary digit, the smallest increment of data on a computer. A bit can hold only one of two values: 0 or 1, corresponding to the electrical values of off or on, respectively.
Because bits are so small, you rarely work with information one bit at a time. Bits are usually assembled into a group of eight to form a byte. A byte contains enough information to store a single ASCII character, like "h".
How computer memory works
Eight bits are known as a byte.
The binary unit system is as follows:
|8 bits||1 byte (B)|
|1,000 bytes (1,000 B)||1 kilobyte (KB)|
|1,000 kilobytes (1,000 KB)||1 megabyte (MB)|
|1,000 megabytes (1,000 MB)||1 gigabyte (GB)|
|1,000 gigabytes (1,000 GB)||1 terabyte (TB)|
|1,000 terabytes (1,000 TB)||1 petabyte (PB)|