• Tuesday April 7,2020


We explain what a bit is, what are its different uses and the methods in which this computing unit can be calculated.

Unbit is the minimum unit of information used by computer science.
  1. What is a bit?

In computer science, it is called `` bit '' (acronym in English of `` Binary '' digit, that is, `` binary digit '') to a value of the binary numbering system . This system is called that because it comprises only two basic values: 1 and 0, with which an infinite number of binary conditions can be represented: on and off, true and false, present and absent, etc.

Unbit, then, is the minimum unit of information used by computer science, whose systems are all supported by that binary code. Each informationbit represents a specific value: 1 0, but by combining different bits you can get many more combinations, for example:

Model of 2 bits (4 combinations):

00 Both off

01 First off, second on

10 First on, second off

11 Both lit

With these two units we can represent four point values . Now suppose we have 8 bits (one octet), equivalent in some systems to one byte : 256 different values ​​are obtained.

In this way, the binary system operates paying attention to the value of the ``bit '' (1 or 0) and its position in the represented chain: if it is turned on and appears in a position to the left its value doubles, and if it appears to the right, it is cut in half. For example:

To represent the number 20 in binary

Binary value net : 1 0 1 0 0

Numerical value per position: 168421

Result: 16 + 0 + 4 + 0 + 0 = 20

Another example: to represent the number 2.75 in binary, assuming the reference in the middle of the figure:

Binary value net : 0 1 0 1 1

Numerical value per position: 4210.50.25

Result: 0 + 2 + 0 + 0.5 + 0.25 = 2, 7 5

The bits in value 0 (off) are not counted, only those of value 1 (on) and their numerical equivalent is given based on their position in the chain, to form thus a representation mechanism that will then be applied to alphanumeric characters (called ASCII).

In this way the operations of the microprocessors of the computers are registered: there can be architectures of 4, 8, 16, 32 and 64 bits . This means that the microprocessor handles that internal number of records, that is, the calculation capacity of the Arithmetic-Logical Unit.

For example, the first computers in the x86 series (the Intel 8086 and the Intel 8088) had 16-bit processors, and the noticeable difference between their speeds had to do not so much with their processing capacity, but with the additional help of a 16 and 8 bit bus respectively.

Similarly, bits are used to measure the storage capacity of a digital memory.

See also: HTML.

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