I
System of symbols and rules used for expressing information according to an unvarying rule for replacing a piece of information from one system, such as a letter, word, or phrase, with an arbitrarily selected equivalent in another system.
Substitution ciphers are similar to codes except that the rule for replacing the information is known only to the transmitter and the intended recipient of the information. digital computers are examples of codes. Elaborate commercial codes were developed during the early 20th century (see Jean M.E. Baudot , Samuel F. B. Morse ). In recent years more advanced codes have been developed to accommodate computer data and satellite communications. See also ASCII , cryptography .
II
[c mediumvioletred] (as used in expressions)
American Standard Code for Information Interchange.
Beginner's All purpose Symbolic Instruction Code
bar code
binary code
building code
Clarendon Code
genetic code
German Civil Code
Hammurabi Code of
Justinian Code of
law code
machine code
Morse code
Napoleonic Code
Code Civil
slave code
Universal Product Code
{{link=zip code">zip code
black codes