(mathematics) The branch of mathematics dealing with the art of transmitting messages reliably over a noisy channel by adding redundancy to the message.

A sequence of letters and/or numbers added to a postal address to aid the sorting and delivery of post/mail.

plural of ZIP Code

A numeric code generated at regular intervals by a timing system.

Any code whose elements may take one of three values

(computing) The output of a compiler or assembler; it is not necessarily executable directly without linking to other modules

(computer science) A system of instructions and data directly understandable by a computer's central processing unit.

plural of time code

A substitution cipher

plural of line code