A mnemonic device is a memory aid. It makes information easier to remember by linking it to something your brain holds well, such as a word, a rhyme, an image or a place. “ROYGBIV” for the colors of the rainbow is a mnemonic device.
The word comes from the Greek for “memory”. It is spelled with a silent “m” at the start, and people often search for it as “pneumonic” or “memonic”. This guide lists the main types with an example of each, shows how to make your own, and answers common quiz questions about them.
Types of mnemonic devices, with examples
| Type | How it works | Example |
|---|---|---|
| Acronym | Make a word from the first letters of a list | HOMES for the Great Lakes: Huron, Ontario, Michigan, Erie, Superior |
| Acrostic | Make a sentence whose words start with those letters | “Every Good Boy Does Fine” for the treble staff lines E, G, B, D, F |
| Rhyme or song | Set the facts to rhythm or a tune | “Thirty days hath September, April, June and November” |
| Chunking | Split a long string into small groups | 0412 555 893 instead of 0412555893 |
| Method of loci | Place images along a familiar route | Picture eggs on your doormat and batteries on your coat hook |
| Peg system | Hang items on a fixed list of rhyming pegs | One-bun, two-shoe: a bun stuffed with item one, a shoe full of item two |
| Major (phonetic) system | Turn digits into consonant sounds, then into words | 32 becomes M and N, which becomes “moon” |
| Keyword method | Link a foreign word to a similar-sounding word in your language | Spanish “pato” (duck) sounds like “pot”: picture a duck in a pot |
Acronyms and acrostics
Both use the first letter of each item. An acronym turns those letters into a word, like HOMES. An acrostic turns them into a sentence, like “Every Good Boy Does Fine”. They suit short, fixed lists you need in order. They are quick to make but only hold a handful of items.
Rhymes and songs
Rhythm and melody fix the order of words. That is why children learn the alphabet as a song. Use rhymes for sequences and anything you will recite. The same idea, hearing a pattern as a tune, helps on the sequence memory test.
Chunking
Chunking means grouping a long string into small units. Phone numbers, card numbers and dates are all chunked. It is the most useful everyday mnemonic and the easiest to test. Try grouping digits on the number memory test and watch your span go up. The average number memory score page shows what an untrained span looks like.
Method of loci (memory palace)
Place vivid images along a familiar route, then walk the route in your mind to recall them. It is the strongest method for long or ordered lists, and top memory competitors use it. Learn it on the method of loci page, or try the memory palace builder.
The peg system
First learn a fixed set of “pegs”, often number-rhyme pairs: one-bun, two-shoe, three-tree. Then link each new item to its peg with a vivid image. It works well for numbered lists you use often. It takes some setup, but you can reuse the pegs.
The major system (phonetic system)
The major system gives each digit a consonant sound. 0 is s or z, 1 is t or d, 2 is n, 3 is m, 4 is r, 5 is l, 6 is j, sh or ch, 7 is k or hard g, 8 is f or v, and 9 is p or b. Vowels are free fillers. So 32 is M and N, which can become “moon”, and 94 is P and R, which can become “pear”. Turning numbers into words gives you images you can store in a memory palace. Memory competitors use systems like this for long numbers.
The keyword method
The keyword method is for vocabulary. Find a word in your own language that sounds like the foreign word, then picture it interacting with the meaning. Richard Atkinson and Michael Raugh tested it in 1975 with Stanford students learning Russian. Students given keywords learned more words and remembered more of them weeks later.
Why mnemonic devices work
Your brain remembers vivid, organized, meaningful things far better than loose facts. A mnemonic adds structure (a word, a rhythm, a route) and meaning (an image) to material that has neither. A mnemonic doesn’t shrink the information or raise your memory capacity. It gives you a better way to find the information later.
How to make a mnemonic device
- Look at what you need to remember. Is it a short list, a long list, a number, or a new word?
- Pick the type that fits. Short list in order: acronym or acrostic. Long list: method of loci. Numbers: chunking or the major system. Vocabulary: keyword method.
- Write the first draft. Take the first letters, find the rhyme, or choose the route and stops.
- Make it vivid and a little absurd. A giant flaming carrot is easier to recall than a normal one.
- Add motion and senses. Hear the item, feel it, watch it do something.
- Test it. Cover the original, recall from the mnemonic, and fix any part that fails.
If you’d rather not start from a blank page, try the mnemonic device generator to build one from your own list.
Test whether it worked
The honest way to know a mnemonic helps is to measure it. Take a memory test cold, learn a technique, practice for a couple of weeks, then retest. To understand the systems these tricks rely on, read how memory works.
Frequently asked questions
What is a mnemonic device in simple terms?
It is a trick for remembering something by linking it to a pattern you already know. That might be a word made from first letters, a rhyme, a picture, or a familiar place. “ROYGBIV” for the rainbow colors is a mnemonic device.
What is an example of a mnemonic device?
“Every Good Boy Does Fine” for the treble staff lines E, G, B, D and F is a classic example. Others include HOMES for the Great Lakes, “Thirty days hath September” for the months, and splitting a phone number into groups of three or four digits.
Which of the following is an example of a mnemonic device?
In quiz questions, the answer is usually the option that uses a memory aid to store information. Acronyms (ROYGBIV, HOMES), acrostic sentences (“Every Good Boy Does Fine”), rhymes, chunking a phone number, and the method of loci all count. Simply re-reading notes, highlighting text, or repeating a fact over and over are study habits, not mnemonic devices, because they add no pattern or image to hang the information on.
What are the different types of mnemonic devices?
The main types are acronyms, acrostics, rhymes and songs, chunking, the method of loci, the peg system, the major (phonetic) system, and the keyword method. Acronyms and rhymes suit short fixed lists. Chunking and the major system handle numbers. The method of loci handles long ordered lists. The keyword method is for vocabulary.
What is the phonetic mnemonic system?
It is another name for the major system. Each digit maps to a consonant sound, and you add vowels to turn number strings into words you can picture. For example, 32 becomes M and N, which becomes “moon”.
Do mnemonic devices really improve memory?
They reliably improve memory for the specific thing you encode. Training studies on the method of loci and the keyword method show clear gains in recall. They don’t make your memory bigger in general. They give you a dependable way to store lists, facts, numbers and sequences.
Which mnemonic is best for remembering numbers?
Chunking works for short numbers you need briefly. For long numbers you want to keep, use the major system or the peg system to turn digits into images, then store them along a route. For everyday use, grouping digits into threes or fours does most of the work.