In computer terms, the Chinese meaning of bit is bit. In the binary number system in computers, bits, abbreviated as b, are also called bits. Each 0 or 1 is a bit. The number of CPU bits in a computer refers to the maximum number of bits that the CPU can process at one time.
In the binary number system, bit is abbreviated as b, also known as bit. Each binary number 0 or 1 is a bit. Bit is the smallest unit of data storage, of which 8 bits are called a byte. The number of CPU bits in a computer refers to the maximum number of bits that the CPU can process at one time. For example, the CPU of a 32-bit computer can process calculations of 32-bit binary data in one machine cycle. (Recommended learning:PHP video tutorial)
Bit concept
In the binary number system, each 0 or 1 is a bit (bit) , bit is the smallest unit of data storage. Among them, 8bit is called a byte. The number of CPU bits in a computer refers to the maximum number of bits that the CPU can process at one time. For example, the CPU of a 32-bit computer can handle up to 32 bits of data at a time.
Bit is the abbreviation of Binary digit, a term proposed by mathematician John Wilder Tukey (probably proposed in 1946, but some data say it was proposed in 1943). The first official use of this term was on page 1 of Shannon's famous "Information Theory" paper, "A Mathematical Theory of Communication".
Example
Assume that an event occurs in the form of A or B, and the probability of A and B occurring is equal, both 0.5, then a binary digit can be used to represent One of A or B. For example:
1) Binary bits can be used to represent a simple positive/negative judgment
2) A switch with two states (such as a light switch),
3) The on and off of the transistor,
4) The presence or absence of voltage on a certain wire, or
5) An abstract logical yes/no, etc.
Since the length will change after conversion to binary, the amount of information in the next digit in different number systems is not always a binary digit. The corresponding relationship is a logarithmic relationship, such as one digit in octal, octal , equivalent to 3 binary bits. In addition to binary, octal, decimal, and hexadecimal are commonly used in computers.
History
Coding by discrete bits was used in punched cards developed by Basile Bouchon, developed by Joseph Marie Jacquard (1804), and invented by Jean-Baptiste Falcon (1732) The data was later adopted by Semen Korsakov, Charles Babbage, Hermann Hollerith and early on. Computer manufacturers such as IBM. Another variation on this idea is punched paper tape. In all of these systems, the medium (card or tape) conceptually carries a series of hole locations; each location may or may not be pierced and therefore carries a bit of information. Bitwise encoded text was also used in Morse code (1844) and early digital communication machines such as the telex and stock ticker machines (1870).
Ralph Hartley suggested using logarithms to measure information in 1928. Claude E. Shannon first used the word bit in his seminal 1948 paper "The Mathematical Theory of Communication." He attributes his origins to John W. Tukey, who wrote a Bell Labs memo on January 9, 1947, in which he referred to "binary information numbers" as "bits". Interestingly, Vannevar Bush wrote in 1936 about "information points" that could be stored on punch cards used in mechanical computers of the time. The first programmable computer built by Konrad Zuse used binary notation for numbering.
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