A bit is the short for binary digit, taking a value of either 0 or 1, corresponding to the electrical values of off or on, respectively. A bit is abbreviated with a small “b”. A bit is the smallest increment of data on a computer. The value of a bit is usually stored as either above or below a designated level of electrical charge in a single capacitor within a memory device.
Bits are usually assembled into a group of eight to form a byte. For example, the number 10010111 is 8 bits long, or byte. Half a byte (four bits) is called a nibble.
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