Meaning

noun a set of rules or principles or laws (especially written ones)

noun a coding system used for transmitting messages requiring brevity or secrecy

noun (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions

originEtymology tree English Cody Middle English -es English -s English Codes From Cody + -s.

Etymology from Wiktionary, CC BY-SA 3.0