List of mnemonics on arvau

Wikipedia / List of mnemonics

This article contains a list of notable mnemonics used to remember various objects, lists, etc.

Astronomy

Order of planets from the Sun: (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto)
obsolete (per the IAU definition of planet):
1. Most Vegetables Eat More Juice So Usually Never Pee
2. My Very Educated Mother Just Served Us Nine Potatoes
3. Many Vicious Elephants Met Just Slightly Under New Pineapples
4. My Very Easy Method Just Speeds Up Naming Planets
5. Mark's Very Extravagant Mother Just Sent Us Ninety Parakeets
6. Mother Very Eagerly Made A (Asteroids) Jelly Sandwich Under No Protest
7. Many Volcanoes Erupt Molten Jam Sandwiches Usually Not Palatable

Since the IAU change the definition of a planet and relegated Pluto to the status of minor planet, the following has gained popularity

My Very Excellent Mother Just Served Us Nachos

Stellar classification sequence: O B A F G K M R N S

Oh Be A Fine Girl/Guy, Kiss Me Right Now, Sweetheart!

Revised stellar classification sequence: O B A F G K M L T Y

Old, Bald, And Fat Generals Kiss More Ladies Than You

Signs of the zodiac:

||(Aries,||Taurus,||Gemini,||Cancer,||Leo,||Virgo,||Libra, |Scorpio,||Sagittarius,||Capricorn,||Aquarius,||Pisces) |- | A||Tense||Grey||Cat||Lays||Very||Low, |Sneaking||Slowly,||Contemplating|| A||Pounce. |}

Biology

To remember the order of taxa in biology (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species, [Variety]):

"Dear King Philip Came Over For Good Soup" is often cited as a non-vulgar method for teaching students to memorize the taxonomic classification of system. Other variations tend to start with the mythical king, with one author noting "The nonsense about King Philip, or some ribald version of it, has been memorized by generations of biology students".
Dear King Philip Claps Often For Good Science
Dark King Prawns Curl Over Fresh Green Salad
Do Kings Play Chess On Fine Green Silk?
Dumb Kids Prefer Cheese Over Fried Greasy Spinach
Do Kindly Place Cover On Fresh Green Spring Vegetables
Darn Kernel Panics Crash Our Family Game System
Do Keep Pond Clean Or Frog Gets Sick
Dumb Kids Play Catch Over Father's Grave Stone
Daniel Keeps Philip Cat On Friday Getting Salsa
Dumb Kids Pushing Cups Over Feeds Growing Spite

To remember the processes that define living things:

MRS GREN: Movement; Respiration; Sensation; Growth; Reproduction; Excretion; Nutrition

To remember the number of humps on types of camels:

D in Dromedary has one hump; B in Bactrian has two

To recognize poison ivy

Leaves of three, leave it be.
Hairy vine, no friend of mine.
COWS stand for Cold Opposite Warm Same, which are the relation between the components of the Caloric reflex test

To memorise DNA/nucleotide base pairs

Tigers Are Great Cats, first letters of the word pairs (T-A, G-C) stand for base pairs.

To memorise the types of antibodies

GAMED: IgG, IgA, IgM, IgE, IgD

To memorise the first six fields of sequence match records in a SAM file (Query, Flags, Reference name, Position, Mapping quality, CIGAR):

Queen Felicity Rarely Plays Multi-dimensional Chess

Chemistry

To recall the names of the first 20 elements in the periodic table:
1. Harry, he likes beer by cupfuls, not over frothy, never nasty mugs allowed. Since past six closing, are kegs cancelled?
  (H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca.)
To remember the electrodes on which oxidation and reduction occurs (An Ox, Red Cat)

An Ox (Oxidation at Anode)

Red Cat (Reduction at Cathode)

To remember the different charges of the anode and cathode in electrolysis (PANIC):
1. Positive Anode Negative Is Cathode
AN OIL RIG CAT:
1. At the ANode, Oxidation Involves electron Loss.
2. Reduction Involves electron Gain at the CAThode.
CHON: to remember the four most common elements in organisms
1. Carbon, Hydrogen, Oxygen, Nitrogen
CHNOPS: to remember the six most common elements in organisms
1. Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur

Engineering

For the EIA electronic color code, Black(0), Brown(1), Red(2), Orange(3), Yellow(4), Green(5), Blue(6), Violet(7), Gray(8), White(9), Gold(5%), Silver(10%), None(20%)
1. Big brown rabbits often yield great big vocal groans when gingerly slapped
2. Bad boys run our young girls behind victory garden walls
3. B. B. Roy [of] Great Britain [has] Very Good Wife.
A mnemonic to remember which way to turn common (right-hand thread) screws and nuts, including light bulbs, is "Righty-tighty, Lefty-loosey"; another is "Right on, Left off".
For the OSI Network Layer model Please Do Not Throw Sausage Pizza Away correspond to the Physical, Datalink, Network, Transport, Session, Presentation and Application layers.
For power in watts: Twinkle twinkle little star, Power equals I (current) squared R (resistance).
"ELI the ICE man": E leads the I in an inductor, I leads the E in a capacitor. Useful in power factor correction.

Geography

Both names of the northern major circles of latitude (the Arctic Circle and Tropic of Cancer) have six letters; both southern ones (the Antarctic Circle and Tropic of Capricorn) have nine.
The countries of South America in order of largest to smallest by area: Brazil, Argentina, Peru, Colombia, Bolivia, Venezuela, Chile, Paraguay, Ecuador, Guyana, Uruguay, Suriname
Boring, Average Politics Can Become Very Corrupt. People Everywhere Get Used Sometimes
The countries of Central America from North to South: Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, Panama
Big Gorillas Eat Hotdogs, Not Cold Pizza
Including Mexico, My Grandma's Bunny Eats Hamburgers, Not Canned Peas
The Lesser Antilles in the Caribbean Sea including the eight independent nations and eight larger island territories (and excluding the "ABC" islands of Aruba, Bonaire, and Curaçao), in order generally from northwest to southeast:
BUt Angry SaM's StuBborn KNights ABandon Money to Guard Dominant Marines and SteaL SteVe's Barrels of Green Tobacco
(British Virgin Islands, US Virgin Islands, Anguilla, St. Martin/Sint Maarten, St. Barthelemy, St. Kitts & Nevis, Antigua and Barbuda, Montserrat, Guadeloupe, Dominica, Martinique, St. Lucia, St. Vincent and the Grenadines, Barbados, Grenada, Trinidad and Tobago)
The Great Lakes in order of largest to smallest: Superior, Huron, Michigan, Erie, Ontario
Super Heroes Must Eat Oats
And in order from west to east:
Shake My hand Evil Octopus
A more common mnemonic for the Great Lakes, disregarding order:
Huron Ontario Michigan Erie Superior: HOMES
The principal factors affecting climate: LABDOWA
Latitude, Altitude, Build, Distance from the sea, Ocean currents, Wind, Aspect

The countries bordering Germany (clockwise from top): Denmark, Poland, Czechia, Austria, Switzerland, France, Luxembourg, Belgium, Netherlands.

Do Polish Checks Always Say "France Look Back Now"!
The traditional six counties of Northern Ireland are Fermanagh, Antrim, Tyrone, Londonderry, Armagh, and Down. FAT LAD.

The northernmost countries of the African continent, from west to east: Morocco, Algeria, Tunisia, Libya, Egypt.

Most African Tourists Like Elephants.
The southernmost provinces of Canada: British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Newfoundland.
BASMOQN, pronounced "Baz-Mock-Win"

Geology

Geological periods: Precambrian, Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous; Post-Cretaceous Epochs: Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene, Recent (Holocene)
Pregnant Camels Often Sit Down Carefully, Perhaps Their Joints Creak? Possibly Early Oiling Might Prevent Permanent Rheumatism
Paleozoic to Cenozoic: Pregnant Camels Ordinarily Sit Down Carefully, Perhaps Their Joints Creak
Post-Cretaceous Epochs: Please Eat Oats My Pretty Pet Horse (Holocene)
Mohs scale of mineral hardness 1-10:

For Talc(=1), Gypsum(=2), Calcite(=3), Fluorite(=4), Apatite(=5), Orthoclase(=6), Quartz(=7), Topaz(=8), Corundum(=9), Diamond(=10)

Tall Girls Can Fight And Other Queer Things Can Develop
TAll GYroscopes CAn FLy APart ORbiting QUickly TO COmplete DIsintegration
Toronto Girls Can Flirt And Only Quit To Chase Dwarves
Terrible Giants Can Find Alligators Or Quaint Trolls Conveniently Digestible
Tall Gene Calls Florence At Our Quarters To Correct Dumbness

Differentiating stalactites from stalagmites.

The 'mites go up and the 'tites come down. When one has ants in one's pants, the mites go up and the tights come down. (In a strict scientific sense, a mite is not an ant, although "mite" in common speech can refer to any small creature.)
Stalactites hang tight, hang down like tights on a line; stalagmites might bite (if you sit on them), might reach the roof.
Tights hang from the Ceiling, and Mites crawl around on the Ground
You need might to do push-ups (from the floor). You must hold tight doing chin-ups (off the ceiling).
Stalactites are on the ceiling. Stalagmites are on the ground.
Stalactites hang tightly ; stalagmites stand mightily.

History

Chinese dynasties (simplified): Xia (Hsia), Shang, Zhou (Chou), Qin (Ch'in), Han, Jin, Southern and Northern, Sui, Tang, Song, Yuan, Ming, Qing (Ching)
She Shamefully Chose Chinese Hand Jingles (and) SiNfully Sweet Tango Songs: "You (and) Me, Chickadee!"
English dynasties (simplified): Norman, Plantagenet, Lancaster, York, Tudor, Stuart, Hanover, Windsor
No Plan Like Yours To Study History Wisely.
Wives of Henry VIII (names): Aragon, Boleyn, Seymour, Cleves, Howard, Parr
All Boys Should Come Home Please
Wives of Henry VIII (manner of death): Divorced, beheaded, died / Divorced, beheaded, survived.
British nobility rank order (simplified): Duke, Marquess, Earl, Viscount, Barons
Do Men Ever Visit Boston?
Assassinated US presidents and perpetrators: Lincoln by Booth, Garfield by Guiteau, McKinley by Czolgosz and Kennedy by Oswald.
Losers Bearing Grudges Grieve Mainly Cowards Killing Orators

Languages

English

Characteristic sequence of letters

I always comes before E (but after C, E comes before I)

In most words like friend, field, piece, pierce, mischief, thief, tier, it is "i" which comes before "e". But on some words with c just before the pair of e and i, like receive, perceive, "e" comes before "i". This can be remembered by the following mnemonic,

I before E, except after C

But this is not always obeyed as in case of weird and weigh, weight, height, neighbor etc. and can be remembered by extending that mnemonic as given below

I before E, except after C
Or when sounded "A" as in neighbor, weigh and weight
Or when sounded like "eye" as in height
And "weird" is just weird

Another variant, which avoids confusion when the two letters represent different sounds instead of a single sound, as in atheist or being, runs

When it says ee
Put i before e
But not after c

Where ever there is a Q there is a U too

Most frequently u follows q. e.g.: Que, queen, question, quack, quark, quartz, quarry, quit, Pique, torque, macaque, exchequer. Hence the mnemonic:

Where ever there is a Q there is a U too (But this is violated by some words; see:List of English words containing Q not followed by U)

Letters of specific syllables in a word

BELIEVE
1. Do not believe a lie.
SECRETARY
1. A secretary must keep a secret
TEACHER
1. There is an ache in every teacher.
MEASUREMENT
1. Be sure of your measurements before you start work.
FRIEND
1. Fri the end of your friend
SPECIAL
1. The CIA have special agents
BEAUTIFUL
1. Big Elephants Are Ugly
SEPARATE
1. Always smell a rat when you spell separate
2. There was a farmer named Sep and one day his wife saw a rat. She yelled, "Sep! A rat – E!!!"
TOMORROW
1. I will go with Tom or Row.
PRINCIPAL
1. The principal is your pal.
BEGINNING
1. I will beg at the inn.

Distinguishing between similar words

Difference between Advice & Advise, Practice & Practise, Licence & License etc.

Advice, Practice, Licence etc. (those with c) are nouns and Advise, Practise, License etc. are verbs.

One way of remembering this is that the word 'noun' comes before the word 'verb' in the dictionary; likewise 'c' comes before 's', so the nouns are 'practice, licence, advice' and the verbs are 'practise, license, advise'.

Here or Hear

We hear with our ear.

Complement and Compliment

complement adds something to make it enough
compliment puts you in the limelight

Principle and Principal

Your principal is your pal
A rule can be called a principle

Remedial and Menial

Remedial work is meant to remedy.
Menial work is boring but it's mean (-ial) to complain.

Their, There and They're

Theirs is not mine even though 'I' is in it.
There is where we'll be.
They're is a contraction of 'they are.'

Stationary and stationery

Stationery contains er and so does paper; stationary (not moving) contains ar and so does car
A for "at rest", e for envelope

Gray and grey

Gray is preferred in America while grey is preferred in England

First letter mnemonics of spelling

DIARRH(O)EA
1. Dashing In A Rush, Running Harder (or) Else Accident!
2. Dining In A Rough Restaurant: Hurry, (otherwise) Expect Accidents!
3. Diarrhea Is A Really Runny Heap (of) Endless Amounts
ARITHMETIC
1. A Rat In The House May Eat The Ice Cream
NECESSARY
1. Not Every Cat Eats Sardines (Some Are Really Yummy)
2. Never Eat Chocolate, Eat Sardine Sandwiches And Remain Young
BECAUSE
1. Big Elephants Can Always Understand Small Elephants
2. Big Elephants Cause Accidents Under Small Elephants
3. Big Elephants Can't Always Use Small Exits
4. Big Elephants Can't Always Use Small Entrances
MNEMONICS
1. Mnemonics Now Erase Man's Oldest Nemesis, Insufficient Cerebral Storage
GEOGRAPHY
1. George's Elderly Old Grandfather Rode A Pig Home Yesterday.
TOMORROW
1. Trails Of My Old Red Rose Over Window
RHYTHM
1. Rhythm Helps Your Two Hips Move

Grammar

Adjective order in English: OSASCOMP (Opinion, Size, Age, Shape, Color, Origin, Material, Purpose)

On Saturday And Sunday Cold Ovens Make Pastry

Commonly-used coordinating conjunctionss in English: FANBOYS

For, And, Nor, But, Or, Yet, So

French

The verbs in French that use the auxiliary verb être in the compound past (sometimes called "verbs of motion") can be memorized using the phrase "Dr. (and) Mrs. Vandertramp":
devenir, revenir, monter, rester, sortir, venir, aller, naître, descendre, entrer, rentrer, tomber, retourner, arriver, mourir, partir

Spanish

The informal affirmative imperative forms can be memorized using the phrase "Vin Diesel has ten weapons, eh?": ¡Ven! (venir), ¡Di! (decir), ¡Sal! (salir), ¡Haz! (hacer), ¡Ten! (tener), ¡Ve! (ver), ¡Pon! (poner), ¡Se! (ser)
Contexts in which subjunctive mood is used can be memorized using the acronym WEIRDO: Wishes, Emotions, Impersonal expressions, Recommendations/requests, Doubt/denial, Ojalá

Mathematics

Pi

The first 15 digits of Pi can be remembered by counting the letters in the phrase, "How I want a drink, alcoholic of course, after the heavy lectures involving quantum mechanics."

Quadratic equation

The articulation of the quadratic equation can be sung to the tune of various songs as a mnemonic device.

Mathematical operations

For helping students in remembering the rules in adding and multiplying two signed numbers, Balbuena and Buayan (2015) made the letter strategies LAUS (like signs, add; unlike signs, subtract) and LPUN (like signs, positive; unlike signs, negative), respectively. Order of Operations PEMDAS Please - Parenthesis Excuse - Exponents My - Multiplication Dear - Division Aunt - Addition Sally - Subtraction In the UK, the phrase BIDMAS is used instead; Brackets, Indices, Division, Multiplication, Addition, Subtraction.

BEDMAS is more commonly used in Canada and New Zealand.

Trigonometry

The mnemonic "SOHCAHTOA" (occasionally spelt "SOH CAH TOA") is often used to remember the basic trigonometric functions:

Sine = Opposite / Hypotenuse
Cosine = Adjacent / Hypotenuse
Tangent = Opposite / Adjacent

Other mnemonics that have been used for this include:

Some Old Hippie Caught Another Hippie Tripping On Acid.

Ships Of Holland Call At Harwich To Obtain Apples.

Sighs Of Happiness Come After Having Tankards Of Ale.

Some Old Hen Caught Another Hen Taking Off Alone.

Silly Old Hitler Can't Advance His Troops On Africa.

Topology

Mnemonics for Euler's characteristic are "fav.me", for "F add V, minus E, and "veryfun".

Calculus

The mnemonic "LIATE" is commonly used to determine which functions are to be chosen as and in integration by parts.

Logarithmic functions
Inverse trigonometric functions
Algebraic functions
Trigonometric functions
Exponential functions

Medicine

To remember the signs of a stroke:

FAST

Face (Has the victim's face fallen on one side?)
Arms (Can the victim raise both arms and keep them raised?)
Speech (Is the victim's speech slurred? Can they repeat a simple sentence?)
Time (It is time to contact emergency services.)

To remember the steps for Resuscitation:

D.R.S. A.B.C.D

Danger (Check for danger to yourself or others before starting)
Response (Check for signs of life or response)
Send for help (Call for backup, or Emergency services)
Airway (Check for obstruction in the throat)
Breaths (Check for breaths)
CPR (Commence CPR)
Defib (Apply Defibrillator)

Anatomy

To remember the 10 organ systems of the human body:

NICER DRUMS (Nervous, Integumentary, Circulatory, Endocrine, Respiratory, Digestive, Reproductive, Urinary, Muscular, Skeletal)
Intrinsic muscles of hand

'A OF A OF A'

Thenar (lateral to medial-palmar surface):

Abductor pollicis brevis
    Opponens pollicis
    Flexor pollicis brevis
    Adductor pollicis

Hypothenar (lateral to medial-palmar surface):

Opponens digiti minimi
    Flexor digiti minimi
    Abductor digiti minimi

Muscles of mandibular nerve (V3 of trigeminal nerve) : Mylohyoid, Tensor tympani + Tensor veli palatini, Digastric (Anterior) – 4 Muscles of Mastication (temporalis, masseter, medial and lateral pterygoids
My Tensors Dig Ants for Mom
2 big ones, 2 small ones, 2 tensors, 2 pterygoids
Bones of the wrist:Scaphoid bone, Lunate bone, Triquetral bone, Pisiform bone, Trapezium (bone), Trapezoid bone, Capitate bone & Hamate bone
Some Lovers Try Positions That They Can't Handle
She Looks Too Pretty Try To Catch Her
So Long To Pinky, Here Comes The Thumb
Simply Learn The Positions That The Carpus Has
Send Louis To Paris To Tame Carnal Hungers
Stop Letting Those People Touch The Cadaver's Hands
Differential Diagnosis
VINDICATE
Cranial nerves

Music

Bowed strings

Mnemonics are used in remembering string names in violin standard tuning.

Good Dogs Always Eat
Greedy Dogs Always Eat

Mnemonics are used in remembering string names in viola standard tuning.

Cats Give Dogs Advice

Guitar

Mnemonics are used in remembering guitar string names in standard tuning.
Every Average Dude Gets Better Eventually
Eggs Are Deliciously Good Breakfast Energy
Eddy Ate Dynamite Good Bye Eddy
Every Adult Dog Growls Barks Eats.
Every Acid Dealer Gets Busted Eventually
Even After Dinner Giant Boys Eat
Elephants All Dine Generally Before Eight
Elephants And Donkeys Grow Big Ears
Every American Dog Gets Bones Easily
Every Angel Does Good Before Evil
Eat All Day Get Big Easy
Eine Alte Dame Geht Heute Einkaufen (German: an old lady goes shopping today)
Een Aap Die Geen Bananen Eet (Dutch: A monkey that doesn't eat bananas)

Thus we get the names of the strings from 6th string to the 1st string in that order.

Conversely, a mnemonic listing the strings in the reverse order is:

Every Beginning Guitarist Does All Exercises!
Elvis' Big Great Dane Ate Everything
Every Big Girl Deserves An Elephant
Easter Bunny Gets Drunk At Easter
Easter Bunnies Go Dancing After Easter

Ukulele

As for guitar tuning, there is also a mnemonic for ukuleles.

Good Cooks Eat A-lot
Gotta Catch 'Em All
In the other direction it is Aunt Evie Cooks Grits

Reading music

Musicians can remember the notes associated with the five lines of the treble clef using any of the following mnemonics, EGBDF: (from the bottom line to the top)
Every Good Boy Does Fine.
Every Good Boy Deserves Fudge (or Friendship, Fun, Fruit, etc.)
Eggnog Gets Better During February
Empty Garbage Before Dad Flips
Eat Good Bread Dear Father
Every Good Burger Deserves Fries
Every Good Bird Dresses Fly
The four spaces of the treble clef spell out (from the bottom to the top) FACE and can be remembered as FACE fits in the space (between lines)
The five lines of the bass clef from the bottom to the top
Good Boys Do Fine Always
Good Birds Don't Fly Away
Grizzly Bears Don't Fly Airplanes
Great Basses Dig Fine Altos
Goblins Bring Death For All
George Bush Didn't Find Anything
Good Burritos Don't Fall Apart
Good Boys Deserve Fudge Always
Garbage Birds Don't Fly Away
The four spaces of the bass clef from the bottom to the top
All Cows Eat Grass
All Cars Eat Gas
All Conductors Eat Garbage
The five lines of the alto clef from the bottom to the top
Fat Alley Cat Eats Garbage
The four spaces of the alto clef from the bottom to the top
Green Birds Do Fly
The order of sharps in key signature notation is F♯, C♯, G♯, D♯, A♯, E♯, B♯, which can be remembered using the phrase
Father Charles Goes Down And Ends Battle
Father Christmas Gave Dad An Electric Blanket.
Fat Cats Go Down Alleys Eating Birds.
Fidel Castro Gets Drunk And Eats Babies.
Fat Cats Greedy Dogs All Eat Bananas.
The order of flats is B♭, E♭, A♭, D♭, G♭, C♭, and F♭ (reverse order of sharps), which can be remembered using the phrase:
Battle Ends And Down Goes Charles' Father
Blanket Exploded And Dad Got Cold Feet.
Before Eating A Doughnut Get Coffee First.

To remember the difference between the whole rest and the half rest:

A whole rest looks like a "hole in the ground", and a half rest looks like a hat.

Music theory

The 7 modern modes (Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian) may be remembered in order with any of several mnemonics:

I Don't Play Loud Music After Lunch
I Don't Punch Like Muhammad A Li
I Don't Particularly Like Modes A Lot
I Don't Particularly Like My Aunt's Lasagna
Iron Door F(Ph)ridge Lids Mixup (Ae)oily Locals

The 7 modern modes in brightest-to-darkest order (Lydian, Ionian, Mixolydian, Dorian, Aeolian, Phrygian, and Locrian) may be remembered as follows:

Lilacs In Malaysia Don't Always Provide Longevity
LIM DAPL (pronounced "limbed apple")

Philosophy

THE LAD ZAPPA is a mnemonic for the first 11 (and most important) Ionian philosophers: Thales, Heraclitus, Empedocles, Leucippus, Anaximander, Democritus, Zeno, Anaximenes, Protagoras, Parmenides, Anaxagoras .
THE PLAZA PAD is another mnemonic for the first 11 (and most important) Ionian philosophers: Thales, Heraclitus, Empedocles, Protagoras, Leucippus, Anaximander, Zeno, Anaximenes, Parmenides, Anaxagoras, Democritus.
SPA is a mnemonic for the philosophers Socrates, Plato, and Aristotle in their order of appearance, Socrates first.

Physics

Sequence of colours in a rainbow or visible spectrum (red, orange, yellow, green, blue, indigo, violet):

Richard Of York Gave Battle In Vain
Ring Out Your Great Bells In Victory.
Roy G. Biv is also used as a fictitious name
Raving "Oh, You're Great, Bradley!" Is Valid (from quiz show The Chase, referring to host Bradley Walsh)

Theology

TULIP, summarises the core tenets of Calvinism: Total depravity, Unconditional Election, Limited Atonement, Irresistible Grace, and Perseverance of the Saints.

(Further Memory Peg: The Economic boom that allowed the Tulip mania in the Netherlands was ultimately enabled by the Calvinist Ethic)

Transportation

Marine
"Red, Right, Return" reminds the skipper entering ("returning to") an IALA region B port to keep red markers to the starboard of the vessel. Conversely the opposite convention exists in IALA region A ports, where a similar (but significantly different) mnemonic of "Red on the Right Returning To Sea" can be used.
The phrase "there's always some red port (wine) left" is used to remember the basics in seafaring. "Red" refers to the color of navigation lights on the port (left) side of a vessel (as opposed to green on the starboard side).
"Nuclear Restrictions Constrain Fishing and Sailing, People Say" is used to encode the "order of priority" for which vessels have right of way (earlier in the list has priority over later): Not under command; Restricted; Constrained by draft; Fishing vessel; Sailboat; Powerboat; Seaplane.
Aviation uses many mnemonics in addition to written checklists. See also Category: Aviation mnemonics
CRAFT - Clearance limit, Route, Altitude, Frequency, Transponder.
pre-landing: GUMPS - Gas, Undercarriage, Mixture, Propeller, Speed.
pre-final: MARTHA - Missed (procedure), Altitude (limit), Radios (set), Time (limit), Heading (final), Airspeed (descent)
pre-high-altitude - FLOWER - Flow (enabled), Lights (test), Oxygen (charged), Water (humidity), Electricity (on), Radio (check)
pre-flight-paperwork - ARROW - Airworthiness (certificate), Registration, Required (charts), Operating (checklists), Weight and balance
night collision avoidance: Red, Right, Returning - Red nav light on Right implies target is Returning (closing)
radio loss Instrument course - CDEF - as Cleared, else Direct to last fix, else as directed to Expect, else as flight plan Filed
spin recovery - POKER - Power (off), Opposite (full rudder), Klean (flaps, ...), Elevator (briskly forward), Recover (from dive)

Units of measure

Common SI prefixes:
kilo-, hecto-, deca-, deci-, centi-, milli-, in descending order of magnitude:

"Base" (Meters, liters, grams) come in between "deca" and "deci".

Kangaroos Hop Down British Driveways Carrying M&Ms
King Henry Drank Both Diet Cokes Monday
King Henry Died By Drinking Chocolate Milk
deca-, hecto-, kilo-, mega-, giga-, tera-, in ascending order of magnitude:
Decadent Hector Killed Meg's Gigantic Terrier
deci-, centi-, milli-, micro-, nano-, pico-, femto-, atto- in descending order of magnitude:
Darn Clever Mnemonic Makes No Prefix Forgettable, Absolutely