Mnemonic/Catalogs/List of mnemonics in English

Mathematics

• Sin = Obtuse / Hypotenuse; Cosine = Adjacent / Hypotenuse; Tangent = Obtuse / Adjacent – see trigonometry
  • SOH CAH TOA

Science

• The colors of the rainbow: red, orange, yellow, green, blue, indigo and violet.
  • Richard of York gave battle in vain.
• Order of the planets: Mercury, Venus, Terra (or Earth), Mars, Asteroids, Jupiter, Saturn, Uranus, Neptune and Pluto
  • "Mother very thoughtfully made a jelly sandwich under no protest"

Engineering

• The color code on electronic resistors: Black = 0, Brown = 1, Red = 2, Orange = 3, Yellow = 4, Green = 5, Blue = 6, Violet = 7, Gray = 8, White = 9
  • "Bad boys ravish our young girls but Violet goes willingly"