What is binary meaning?

Binary refers to a system of numerical notation that uses only two symbols, typically 0 and 1. The binary system is used in computing and digital electronics because it is easier to represent electronically than decimal or other number systems. In a binary system, each digit represents a power of 2, starting with 20, or 1. The number 10110 in binary represents the decimal number 22, for example. The binary system is also used in programming languages to represent machine instructions and data, and in cryptography to encrypt and decrypt messages.