Mnemonics

A mnemonic is a symbolic abbreviation designed to be as memorable as possible; for instance DSP for Display, CHG for change.

An efficient mnemonic should be as short as possible, but also as clear as possible. The mnemonic system used for CL command names, in which mnemonics are generally three characters long and composed of the phonetically significant consonants, is a good compromise between the conflicting goals of brevity and recognizability.