PAO System: The Person-Action-Object Memory Technique

A number like 739184625 is nine interchangeable digits — nothing to tell one from another, and nothing for memory to hold onto. The PAO System (Person-Action-Object) is how competitive memory athletes turn strings like that into something a brain actually remembers: a specific person, doing a specific action, to a specific object — one vivid mental scene standing in for six digits at once.

The core idea in miniature: 37 always brings to mind the same Person. 91 always brings to mind the same Action. 84 always brings to mind the same Object. Person + Action + Object combine into one bizarre little scene, and that scene is far easier to hold onto than three bare numbers ever were.

What Is the PAO System?

PAO is a mnemonic encoding system — a fixed set of rules for turning abstract information into something concrete and imageable. It works by pre-assigning three things to every two-digit number from 00 to 99:

• Person — a specific, recognizable person associated with that number.
• Action — a distinctive, physical action associated with another number.
• Object — a concrete object associated with a third number.

Once those 300 associations exist (a Person, Action, and Object for each of 100 numbers), encoding is just lookup and combination. A sample of what a finished table might contain:

These are just one reasonable set of choices — use whatever people, actions, and objects are most vivid to you. What matters is that the same number always produces the same three elements, every time you see it.

How the PAO System Works

A six-digit number splits into three two-digit chunks. The first chunk contributes its Person, the second its Action, the third its Object — and the three combine into a single composite scene, which can then be placed into a memory palace like any other image:

The Major System handles encoding one pair of digits into one image; PAO handles encoding three pairs into one image. It's the same underlying idea — turn digits into pictures — but compressed a step further, which is exactly what the next section works through in full.

A Complete Worked Example

Take the six-digit number 128365. Split it into three pairs:

12 · 83 · 65

Suppose your table assigns:

• 12 = Albert Einstein → Person
• 83 = dunking a basketball → Action
• 65 = the Nile River → Object

Combine all three into one exaggerated scene:

That single absurd picture is far easier to hold onto than 128365 ever was — it has a subject, an action, motion, and a setting, all things a brain is already good at remembering. From here, the whole scene gets placed at one memory palace locus, the same way a single Major System word would be. Walking past that locus later hands the scene straight back, and unpacking it — Einstein, dunking, the Nile — hands back 12, 83, 65 in order.

If you've never used a mnemonic system before, that's the entire technique. Everything else in this guide is either building the 300 associations that make this fast, or applying the same three-step combination to longer numbers and to playing cards.

PAO as Mnemonic Compression

It's worth being explicit about what PAO actually buys you, because the benefit is structural, not magical. Without PAO, six digits need six separate mental items — or, using the Major System alone, three words. With a common two-digit PAO table, those same six digits become one composite scene:

That's chunking taken about as far as it practically goes for numbers. It doesn't guarantee perfect recall — a badly built or under-practiced PAO scene is just as forgettable as a badly chosen Major System word — but it does mean fewer images to generate and fewer loci needed per palace, which matters most under time pressure.

How to Create Your Own PAO System

This is the part that takes real time, and it's worth doing deliberately rather than rushing — a table of vague, similar-looking associations is barely more useful than no table at all.

Step 1: Set up numbers 00–99

Lay out a table (paper, spreadsheet, or the PAO tool on this site) with a row for every number from 00 to 99, and three columns: Person, Action, Object. You're filling in 300 associations total — plan to do it in small batches, not one sitting.

Step 2: Choose memorable people

A good Person association is:

• Visually distinctive — easy to picture instantly, not generic.
• Familiar to you — a friend, celebrity, or character you already know well.
• Emotionally salient — someone who stands out, not a forgettable acquaintance.
• Strongly associated with a recognizable look or behavior.

Step 3: Choose distinctive actions

Good actions should be:

• Physical and dynamic — something you can see happening, not a state of mind.
• Visually obvious and different from your other 99 actions.

Avoid vague actions like "thinking," "being," or "knowing" — there's nothing to picture. Prefer concrete, physical verbs: hammering, exploding, surfing, dancing, throwing.

Step 4: Choose concrete objects

Objects should be:

• Visually distinctive and concrete — a specific, physical thing.
• Easy to manipulate mentally — something that can plausibly be thrown, worn, or broken.
• Clearly different from your other objects, so two entries don't blur together.

Step 5: Make the associations consistent

The same number should always produce the same Person, the same Action, and the same Object — every time, without exception. Consistency is what makes recall automatic instead of a fresh decision each time you see a number. If you keep changing your mind about what 45 means, you never get past the "looking it up" stage.

PAO System and the Major System

Where a number comes from often shapes how fast a PAO table gets built. The Major System converts a number into consonant sounds, then into a word: number → sounds → word/image. PAO takes that further, assigning a number → Person, Action, or Object directly.

Many people use the Major System as the seed for their PAO table rather than inventing 300 associations from nothing. For example, 32 → M, N sounds → "man" in the Major System could become a specific man you know as the Person for 32, a specific manly action as the Action for some other number, and so on. The Major System supplies a memorable word; PAO reuses that word as the seed for a vivid character, action, or object. See the full Major System guide for the digit-to-sound chart and conversion method.

PAO vs. Major System vs. Dominic System vs. Method of Loci

These techniques solve different parts of the memorization problem — most serious memorizers combine two or three of them rather than picking just one.

None of these is universally "best" — the Major System and Dominic System both encode two digits per image and are simpler to learn; PAO trades a longer setup for packing three times as many digits into every locus. Combining PAO with the Method of Loci is the standard pairing: PAO compresses the digits, the memory palace organizes the resulting scenes.

How to Use PAO With a Memory Palace

PAO is not itself a memory palace — it's purely an encoding step. The palace is where the resulting scenes actually live:

1. Choose a familiar location you can picture clearly.
2. Establish a fixed route through it, always walked in the same order.
3. Identify distinct loci — specific stops — along that route.
4. Convert the first six digits of your number into a PAO scene.
5. Place that scene at the first locus.
6. Convert the next six digits into a new scene.
7. Place it at the next locus, and continue.
8. To recall, walk the route in order and unpack each scene back into its six digits.

Using the 128365 example from earlier: "Einstein dunking a basketball on the Nile River" gets placed at your first locus — the front door of a familiar house, say. The next six digits become a new scene at the next locus — the hallway — and so on. Twelve digits need two loci instead of six; a hundred digits need roughly seventeen instead of fifty. See Method of Loci for how to build and use a full route.

PAO for Memorizing Numbers

PAO applies to any number you need to hold in memory longer than a few seconds:

• Phone numbers — one or two PAO scenes cover a full ten-digit number.
• Reference and ID numbers — order numbers, confirmation codes, account references.
• Dates — see How to Memorize Dates for date-specific technique.
• Long random numbers — the same three-step process repeated, chunk by chunk.
• Competition-style number memorization — Speed Numbers and Hour Numbers both reward the density PAO provides under a time limit.

A brief note on PINs and passwords: PAO can help you recall one without writing it down, but it isn't a substitute for secure password management. Treat any note or list where you record what a given scene means with the same care you'd give the credential itself.

PAO for Playing Cards

The card version works the same way as the number version, with one difference: instead of two-digit numbers, each of the 52 playing cards gets its own Person, Action, and Object. Cards are grouped into threes exactly like number pairs are:

1. Assign a Person, Action, and Object to each of the 52 cards.
2. Group a shuffled deck into threes — cards 1–3, 4–6, 7–9, and so on.
3. Take the Person from the first card, the Action from the second, the Object from the third.
4. Combine into one composite scene, exactly as with numbers.
5. Place the scene at the next locus of a memory palace route.

A full 52-card deck compresses into 18 scenes instead of 52 individual card memories — the same compression ratio as the number version, applied to cards. See How to Memorize a Deck of Cards for the full method, and build your card associations with the PAO tool, which already includes all 52 cards ready to fill in.

How to Make PAO Images More Memorable

A few practical rules make the difference between a scene that sticks and one that fades:

• Make it bizarre. "Einstein reading a book" is forgettable. "Einstein riding a giant book through a supermarket" is not.
• Add movement. A static scene is weaker than a dynamic one — someone doing something, not just standing near it.
• Add emotion. Surprise, humor, danger, or absurdity all make a scene more vivid than a neutral one.
• Make the interaction obvious. The Person should clearly act on the Object — not just stand next to it.
• Use exaggeration. Huge objects, tiny people, impossible physics, unusual settings — all of it helps a scene stand out from the other 99.
• Keep scenes simple. One clear Person, one clear Action, one clear Object — don't overload a single scene with extra details.

Common PAO Mistakes

• Choosing people who look too similar. Several generic "a man" entries blur together. Fix: use specific, visually distinct individuals.
• Choosing vague actions. "Thinking" or "being" give you nothing to picture. Fix: use physical, dynamic verbs.
• Choosing generic objects. "A thing" or "an item" isn't concrete enough to hold an image. Fix: pick a specific, physical object every time.
• Changing associations repeatedly. Using a different Person for 45 every week defeats the point of a fixed table. Fix: commit to an association once you've chosen it.
• Making scenes too complicated. Piling extra detail onto one scene makes it harder to unpack later, not easier. Fix: keep it to one clear Person, Action, and Object.
• Skipping practice on individual associations. Trying to combine scenes before the underlying 300 associations are solid slows everything down. Fix: drill individual numbers first, then move to composites.
• Attempting long numbers before the list is automatic. A half-built table forces you to stop and think mid-number. Fix: practice with short numbers until recall is instant, then scale up.
• Confusing PAO with the memory palace. PAO encodes; it doesn't store anything by itself. Fix: always pair a finished scene with a locus.
• Relying on passive reading. Reading your table over and over builds recognition, not recall. Fix: test yourself instead — see active recall.
• Never testing recall. Being able to build a scene isn't the same skill as reconstructing the digits from it later. Fix: practice in both directions, number-to-scene and scene-to-number.

How to Learn PAO Efficiently

A practical progression through the skill, roughly in order:

Build the table itself in the PAO tool, then drill it directly there or move to timed practice with Speed Numbers or Speed Cards once a chunk of your table is filled in.

Practice Exercises

Work through these using your own table (or the sample entries above) before revealing the answer.

Frequently Asked Questions

Put It Into Practice

A PAO table only pays off once it's built — reading about the technique won't make 45 retrieve an image on its own. Start with a handful of numbers or cards, drill them until they're automatic, then add more.

Related Techniques

• Method of Loci — the memory palace that organizes the scenes PAO produces.
• Major System — the simpler number-to-word technique PAO tables are often seeded from.
• How to Memorize a Deck of Cards — the full card-memorization method built on PAO.
• Chunking — the general principle PAO pushes to its limit.
• Spaced Repetition — reviewing a finished PAO table before it gets rusty.