Codes or ciphers are ways of writing a message so that only a person with a key can understand it. Using the key, the message can be decoded or deciphered.
Most codes are a combination of phrases, syllables, words, or whole sentences.
This system was invented by Louis Braille so that blind people can read, write, and even write music. This system uses hand signs for letters and for words. Words can be spelled letter by letter or by signs that represent words. Bees perform a unique dance that can communicate to other bees the distance, direction, quality, and quantity of a food source.