The mnemonic dominic system is a mnemonic system used to remember sequences of digits similar to the mnemonic major system

Mnemonic major system

The Major System is a mnemonic technique used to aid in memorizing numbers....

. It was invented and used in competition by several-time memory world champion Dominic O'Brien

Dominic O'Brien

Dominic O'Brien is a British mnemonist and an author of memory related books. He is the eight time world memory champion and works as a trainer for Peak Performance Training....

.

Differences from the major system

• Uses people and actions, rather than objects, to represent numbers.
• Each pair of digits represents an action as well as a person.
• Combines people together with actions to create large number 'chunks'.

Encoding pairs of digits as people

Using the dominic system every pair of digits is first associated with a person. Dominic O'Brien feels that stories and images created using people are easier to remember. This encoding is carried out ahead of time and the people are reused, since it can take quite some time.

To perform this encoding, each digit is associated with a letter using the table below. These letters then become the initials of the person representing this number. People will often use quite a loose definition of "initials", using the initial letters of a phrase describing a person.

Number	1	2	3	4	5	6	7	8	9	0
Mnemonic	A	B	C	D	E	S	G	H	N	O

Encoding pairs of digits as actions

Once each pair of digits has been associated with a person one can then cheaply create a corresponding action for each person. For example, if one had chosen to represent AE as the physicist Albert Einstein one might use a corresponding action of writing on a blackboard.

Usage

Once the mappings of pair of digits are in place a sequence of digits can be converted into a story by first encoding pairs of digits as people or actions and then chaining these people and actions together.

For example, one might remember the number 2739 as follows: First 27 would be encoded BG and then as [Bill Gates], then 39 would be encoded as CN and then Chuck Norris. Using the first two digits as a person and the second two as an action, one creates the image of Bill Gates

Bill Gates

William Henry "Bill" Gates III is an American business magnate, investor, philanthropist, and author. Gates is the former CEO and current chairman of Microsoft, the software company he founded with Paul Allen...

 delivering a roundhouse kick. Similarly 3927 might be converted into the image of Chuck Norris writing software.

Longer numbers become stories. The long number 27636339, for example, could be chunked into 2763 6339 and then converted into BGSC SCCN. If the memorizer has also associated Santa Claus

Santa Claus

Santa Claus is a folklore figure in various cultures who distributes gifts to children, normally on Christmas Eve. Each name is a variation of Saint Nicholas, but refers to Santa Claus...

delivering presents with SC, then the chunk 2763 would represent Bill Gates delivering presents while 6339 would represent Santa Claus performing a roundhouse kick. The remembered story, therefore, could be that Bill Gates delivered presents and then got roundhouse kicked by Santa Claus.

This might be combined with the loci system to have certain events happen at locations along a pre-remembered path.

Packs of cards

Although the Dominic system is a method for remembering long sequences of numbers, it can also be used to remember other sequences such as the order of a deck of playing cards. This works by establishing some method of systematically converting the objects into numbers. If the nine of clubs is associated with 39 (CN), for instance, then Chuck Norris or a roundhouse kick could be used in a story describing where the nine of clubs is in the deck.