What is mnemonics?
A mnemonic device, or memory aid is any learning technique that aids information retention. Mnemonics make it easier to recall certain information by association.
The term mnemonic is derived from the Ancient Greek word μνημονικός (mnemônikos) meaning "of memory", or "remembrance". The same root appears in "mnemonic", which is a reference to their use in aiding memory.
A classic mnemonic device uses an easily remembered story or poem to link items that would otherwise be difficult to memorize. For example, in an article on improving memory William Loftus recommends using a concrete poem as a mnemonic device for numbers:
One, two, buckle my shoe; Three, four, shut the door; Five, six, pick up sticks; Seven, eight, lay them straight; Nine, ten, a big fat hen; Eleven, twelve come out again;