code

noun

1.
a set of rules or principles or laws (especially written ones)
lawbook codification
Derived from:
codify
2.
a coding system used for transmitting messages requiring brevity or secrecy
homewrit riddlewrit
Derived from:
code
3.
(computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions
computer code
Derived from:
code
4.
a series of letters, numbers or symbols assigned to something for the purpose of classification or identification