| code | (noun) a coding system used for transmitting messages requiring brevity or secrecy | - |
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| (noun) a set of rules or principles or laws (especially written ones) | Synonyms: codification |
| (noun) (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions | Synonyms: computer code |
| (noun) a series of letters, numbers or symbols assigned to something for the purpose of classification or identification | - |
| microcode | (noun) (computer science) coded instructions that are stored permanently in read-only memory | Synonyms: firmware |
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| postcode | (noun) a code of letters and digits added to a postal address to aid in the sorting of mail | Synonyms: postal code, ZIP, ZIP code |
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