Mnemonic

A mnemonic is a verse or other verbal aid to remembering a list that may otherwise be difficult to remember.
For a discussion showing how mnemonics may be developed for general application see mnemonic technique.

The following is a sampling:

• The personal name Roy G. Biv helps us to remember the order of the colours in the spectrum. In England "Richard Of York Gave Battle In Vain" was popular.
• The following from the zodiac helps us to remember the order of the signs.

::The Ram, the Bull, the Heavenly Twins,
::And next' the Crab, the Lion shines,
::The Virgin and the Scales.
::The Scorpion, Archer, and the Goat,
::The Man who holds the Watering Pot,
::And Fish with glittering scales.

• The phrase "Bad Boys Rape Our Young Girls But Violet Gives Willingly" is used to remember the colour coding on resistors, capacitors and other electronic components.
• The phrase "Oh Oh Oh, To Touch And Feel A Girl, Very Sexy & Hot" is used by students of anatomy to remember the order of the Cranial nerves.