The Major System

The Major System is a code that turns each digit from 0 to 9 into a consonant sound, so that any number can be read as a word, or a string of words, you can picture: 14 is t then r, tire, and 31 is m then t, mat. Vowels carry no value, so you add whichever ones make a word. On this site's 00-99 peg chart, 32 is moon and 84 is fire, so a PIN like 3284 becomes one picture, a moon on fire, and the numbers drill runs pairs like these against a clock. If the Method of Loci gives you a place to put things, the Major System gives you a way to turn arbitrary numbers into things you can put places. Its first known modern form dates from 1825, and a European forerunner is nearly two centuries older.

You are about to memorise an alphabet, and once you have, the world becomes addressable in a way it wasn't before. Phone numbers, historical dates, batting averages, license plates, the room where you parked your car: each of these stops being a sequence of abstractions and starts being a sentence. The sentences are silly, but they are also unforgettable. The same code can even rescue the few multiplication facts that refuse to stick, by turning an answer like 56 into one word, leash.

The history, briefly

Codes that give digits phonetic values are older than the system: India's Katapayadi scheme dates back to at least the 7th century. The first known in Europe was published in 1634 by Pierre Hérigone, a French mathematician. His table gave each digit a consonant or a vowel, so 1 was p or a, 3 was c or i and 5 was t or u, and 314159 became cadator. His letters are not the modern ones (today 1 is t or d, and 3 is m).

Later writers elaborated on it. In 1648 Johann Just Winckelmann, writing as Stanislaus Mink von Weunsshein, developed it further, and some accounts credit him with introducing the system. In 1730 Richard Grey published a complicated system that used both consonants and vowels to represent the digits. In 1808 Gregor von Feinaigle represented the digits by consonants, with the values of 8 and 9 reversed compared with the table below. In 1825 Aimé Paris published the first known version in its modern form.

Where the name comes from is not certain. "Major System" may refer to Major Bartłomiej Beniowski, who published a version of the system in 1845 in The Anti-Absurd or Phrenotypic English Pronouncing and Orthographical Dictionary.

In the United States, Marcus Dwight Larrowe taught memory courses based on it under the alias Dr. Antoine Loisette. In the late 1800s Christopher Louis Pelman and William Joseph Ennever ran booklets and memory courses using it, which grew into the Pelman Schools. Harry Lorayne popularised it again in books from 1957 through the 1980s, the best known being The Memory Book, written with Jerry Lucas. Tony Buzan taught it to a wide audience in the same era. Memory-sport competitors typically learn it first, and many then move on to bigger systems, such as a peg for every three-digit number.

The table below is the modern form, written for English sounds.

The mapping

That is the whole table. It is shorter than the Greek alphabet and easier to memorise than a phone number, so read it twice.

The crucial points:

• The encoding is phonetic, not orthographic. t and d both encode 1 because the tongue does the same thing for both. Knight encodes 21 (n-t), not 5621 (k-n-i-gh-t), because only the spoken n and t carry digits.
• Vowels are free. Toe, too, tea, tie, tow, Thai all encode 1, because the vowel is silent for the system. This is what gives you flexibility: you'll always be able to find a peg word for any pair of digits, because vowels are unconstrained.
• Doubled consonants count once. Kettle is k-t-l = 715, not 7115.
• Silent letters count zero. Knight is just 21.
• h, w, y are silent (they encode no digit).

If you want the finished list rather than the reasoning, the full 00-99 peg chart has all hundred pegs on one page, plus the ten hundred-blocks of the three-digit table.

Worked examples

Let's encode some numbers.

13. The pair (1, 3) maps to (t/d/th, m). The shortest English word that uses these consonants in this order is tomb, which makes tomb the peg word for 13. (You could also pick tame, team, time, dime, dome, thumb. We pin one as canonical to keep the system addressable, but if a different vowel sticks better in your head, use it.)

13, Major System?tombA sarcophagus in a stone chamber. Mummy bandages, the T-M sound a sealed lid sliding shut.

42. (r, n) → rain, rein, rune, Ron; the canonical peg is rain.

42, Major System?rainA grey downpour against a windowpane. R-N is the steady percussion of drops.

73. (k, m) → comb, cameo, cameo's if you must; the canonical peg is comb.

73, Major System?combA black plastic comb dragging through hair. K-M is the static crackle.

00. (s/z, s/z) → sauce, seas, zoos, Zeus; the canonical peg is sauce.

00, Major System?saucePicture a glass jug tipping, a thick brown sauce hissing onto a plate. The double-S sound is the sizzle.

That last one is illustrative: all four encode 00, because the system hears only the two soft hisses and is indifferent to everything else. The chart takes sauce because it is a thing you can pour over a locus and see land, where seas is too big to put on a shelf. But Zeus is a perfectly legal peg for "zero zero", and if the king of the gods is what arrives when you see the digits, use him. The system does not care about literary propriety; it cares about getting one distinct, vivid word for every pair of digits from 00 to 99. Pick whichever sticks.

How to actually use it

The Major System produces peg words, units of content you can hang on a locus. The encoding is a translation: digits → sounds → words → images.

To memorise a number:

1. Chunk the number into digit pairs. 314159 becomes 31, 41, 59.
2. Translate each pair into its peg word. 31 → mat; 41 → rat; 59 → lip.
3. Place each peg word at a locus in your palace, in order, as a vivid image.
4. Walk the route to recover.

For 314159 (the first six digits of pi) your palace might contain: a soggy welcome mat on the front step (31), a rat chewing the mailbox (41), and a smirking lip hanging from the doorknob like a wreath (59). To recall, you walk the route and read off the digits.

For longer numbers, two refinements help. First, you can chunk into triples instead of pairs, encoding three digits per peg word: Dollar is d-l-r = 154, and Cinema is s-n-m = 023. This is denser but harder to come up with on the fly, so most beginners stick with pairs until they've memorised enough peg words to free themselves up. Second, you can compose pairs into a single image: 31-41 = mat + rat becomes "a rat eating a soggy mat." This halves the locus count but compresses the image, which is fine for short numbers and exhausting for long ones.

Choosing your peg words

Memorising 100 peg words (one for each pair, 00 through 99) is the single biggest investment in this technique, and it pays compound interest. Once they are in your head, you no longer have to derive them from the alphabet, because they are already there, ready to be hung on a locus.

Pick concrete, depictable nouns, since a verb or an adjective is hard to draw a picture of. Rat is better than roar. Knot is better than knew. Toy is better than the (which encodes 1, technically, but pictures don't form around it).

Pick short peg words: two syllables at most, and one is ideal, because the fewer extraneous sounds, the cleaner the encoding. Dome beats mediocre every time.

Pick peg words that are maximally distinct from each other. Mat, mate, meat and moat all encode 31, so pick one and pin it: the peg list is a small dictionary, and ambiguity is a slow leak.

Major Dictionary ships a canonical 100-word Major peg list: Major Dictionary 00-99, illustrated, annotated, and adopt-able as a starter system. It is opinionated, and you may eventually replace half of its choices with your own. That is fine, because the canonical list is a training-wheels set and the goal is to outgrow it.

The Dominic alternative

If you spend any time in memory-sport circles, you will run into the Dominic System, named for Dominic O'Brien, the eight-time World Memory Champion who developed it. The Dominic System uses a different mapping (letters of the alphabet, not consonant sounds) and pegs each pair of digits to a person rather than an object.

The mapping looks like this:

A pair of digits (say 24) becomes the initials BD, for Beyoncé and Dwight. You then assign each person a characteristic action (maybe Beyoncé sings and Dwight runs a beet farm), so the pair of digits 24 becomes the image Beyoncé runs a beet farm (or, with PAO, Beyoncé farming a beet).

The Dominic System is harder to bootstrap (you have to assign 100 people, plus their actions, before it works) but, once bootstrapped, has two advantages over the Major:

1. People are stickier than objects. A face holds a memory better than a mat. The cognitive-science literature is mixed on this, but the consensus among memory-sport competitors is that human faces light up the recall pathway in a way that inanimate nouns don't.
2. Actions encode movement. Once you've assigned each person an action, you have a built-in second variable, which means you can encode four digits per locus instead of two: a pair for the person, a pair for the action.

The catch is that the Dominic System is personal in a way the Major isn't. Tomb means 13 to anyone who knows the table, but "Beyoncé farming a beet" means 24 only to you. That makes the Dominic System non-transferable (you can't share a peg list) and slower to onboard. The Major is the lingua franca; the Dominic is dialect.

Most serious memorists end up with a hybrid: Major encoding for short numbers (phone numbers, historical dates, license plates) and Dominic for long ones (deck-of-cards memorisation, multi-page digit recalls). Major Dictionary ships Major 00–99 as the canonical starter; the Dominic System has its own guide. The two coexist in the same head without conflict.

When not to use it

The Major System is excellent for memorising digits and bad at almost everything else.

Don't use it for words. If you need to memorise the names of the noble gases (helium, neon, argon, krypton, xenon, radon), the Major isn't the right tool, because you have nothing to encode the letters against. Use a memory palace with the names directly, or a name-mnemonic like "Henry Needs A Krypton Xenon Radon-detector."

Don't use it for sequenced facts that aren't numerical. Major encodes digits, so if you need to memorise the order of the planets, don't translate "Mercury, Venus, Earth, Mars" into peg words; just put the planets at the loci.

Don't use it for short numbers you'll only need once. A six-digit Wi-Fi password you'll use for ten minutes is not worth the encoding cost, so save Major for things you actually want to keep.

Don't try to master all 100 in one sitting. It is exhausting and you will mix them up, so do 00–09 the first day, 10–19 the second, and so on. Within two weeks you'll have built all hundred. Built is not the same as fluent: the drilling that makes a peg arrive without deliberation takes several weeks more, and the discipline is the same as for any 100-item set, spaced repetition with the keyword and image visible until it's solid.

What it feels like once it's in

Practitioners describe the same shift, almost verbatim. The first couple of weeks, you're consciously decoding: you see the digits, you remember the table, you derive the consonants, you derive the peg word, and then, finally, you have an image you can put on a locus. It's slow and noisy, and you wonder if the technique is actually working. (It is: the friction is the cost of building the table into your unconscious.)

Around week three, something flips. You see the number 42 and the peg word rain arrives without you having looked anything up. Rain is, at that point, what 42 is to you, in the same way that cat is what a particular furry domestic mammal is. The encoding has dropped below conscious effort, and 42 has become a small thing you can pick up and place somewhere.

After a few months, the digits vanish: in the moments you're using the system, you stop perceiving 42 as a number at all and perceive a soggy, drumming rain. The translation has become so fast that the numerical surface form is bypassed entirely. Memorists report that this is the point at which long numbers feel physical instead of abstract, and at which their drilling speed plateaus and starts climbing again.

This is the durable payoff: the Major System is not a set of tricks but a permanent rewiring of how digits feel.

What it doesn't do

The Major System does not make you generally smarter, does not improve your performance on any task that doesn't involve digit retention, does not improve your reading comprehension or your ability to follow a complicated argument, does not slow cognitive aging, and does not add to the stock of things you understand. The cognitive-science literature is clear about this: trained mnemonists score normally on every non-mnemonic measure of cognition.

What the technique does is take a category of task (here is a sequence of digits; remember it) and make it cheap, nothing more. But "cheap" compounds in ways that feel like becoming smarter, because the cost of remembering things is one of the central overheads of intellectual work. If memorising a phone number takes fifteen seconds and stays in your head for a week, you start using phone numbers differently. If memorising the date of every important event in a field of study takes a few minutes per fact and is durable for years, you start operating in that field with a different relationship to detail. The technique buys headroom, not horsepower; the headroom is what lets you go further.

A small note on speed

The Major System is the substrate the world records for digit memorisation are built on. The leading competitors in the 5-minute Numbers discipline memorise more than 600 digits in a single sitting: 642 on the WMSC list and 630 on the IAM list, since the sport split into two bodies with two record lists in 2017. Neither was set with plain Major; both come out of a three-digit system: a thousand images, one for every number from 000 to 999, which is the shape most top competitors now use, and which the competition guide lays out alongside the rest of the ladder.

You don't need 1,000 peg words, and you probably don't need 100, but the trajectory is real. Major is not the only encoding at the top (the Dominic System is a different idea about what a pair of digits should become, and it has its own champions), yet the pairs-to-sounds-to-words move is the one nearly everybody learns first, and it scales up without breaking. The encoding is durable, and the records keep getting set on top of it.

Where to start

The shortest path to using this:

1. Memorise the digit-to-sound table, which takes twenty minutes, tops.
2. Adopt our canonical Major 00–99 peg list. Each peg word is illustrated; the page surfaces an image, the encoding rationale, and a 1-line story for every entry from sauce (00) to pipe (99). You can adopt the whole system in one click and start drilling against it tomorrow.

3. Do the SM-2 spaced-repetition drill against the system once a day for ten minutes. Within two weeks you will have built all hundred; the spaced drilling that makes them arrive without deliberation takes several weeks more. Give it a month or two and an arbitrary 20-digit number goes down in under thirty seconds.

The first time you do it, it will feel slow, because you will be looking up the table in your head. By the third week the table is gone: the digits are already sounds and the sounds are already peg words, so you will memorise a phone number on the way in from the parking lot.

This is what the technique buys you: numbers stop being abstract and become things you put on shelves.

See also: The Method of Loci for the spatial substrate; Person · Action · Object for the three-image extension used in card memorisation.