In computer programming, a "mnemonic code" is an abbreviated term that is used to define a specific command or function, according to Techopedia. These shorter codes provide the same functionality as the original term but are more efficient to enter.
Mnemonics allow users to access quickly a wide variety of commands, services, programs and functions without the need to type out extended phrases. One example of a mnemonic code is the term "inc," which on an Intel microprocessor refers to the command "increase by one." Rather than type the entire phrase, the letters "inc" can be entered. Mnemonic code derives from the concept of traditional mnemonics in which abbreviations, rhymes or simple stories are used to help people remember information.