Binary code practical applications such as computers, electric circuits, and more. The bit string is not the only type of binary code. A binary system, in general, is any system that allows only two choices such as a switch in an electronic system or a simple true or false test. Braille is a type of binary code that is widely used by the blind to read and write by touch, named for its creator, Louis Braille. This system consists of grids of six dots each, three per column, in which each dot has two states: raised or not raised. The different combinations
The blind leading the blind The blind leading the blind "The blind leading the blind" is an idiom and a metaphor in the form of a parallel phrase, it is used to describe a situation where a person who knows nothing is getting advice and help from another person who knows almost nothing. It can be traced back to the Upanishads, which were written between 800 BCE and 200 BCE. A similar metaphor exists in the Buddhist Pali Canon, composed in North India, and preserved orally until it was committed to writing during the Fourth Buddhist Council in Sri Lanka in 29 BCE. The expression