Mnemonics, or mnemonic strategies, are a wide range of techniques in which information is organized in specific ways in order to be easier to retrieve from memory. Acronyms are an example of a type of mnemonic, where the first letters of a group of words are organized into a meaningful structure.  Other mnemonics include visualization strategies (e.g. see: Method of Loci) and peg-word systems, where terms are linked together and their relationships to each other are memorized.

The term mnemonic is named after Mnemosyne, the Greek goddess of memory.

Source:

Reisberg, D. (2018). Cognition: Exploring the science of the mind, 7th ed. New York, NY: Norton. 224-228