MAJOR

The Major System (a.k.a. the phonetic number system) is a centuries-old mnemonic that maps each digit 0–9 to a consonant sound. Because vowels and the sounds w, h, y carry no value, you are free to slot them between the coded consonants to spell a memorable word — and a word (especially a concrete, picturable noun) is far easier to remember than a string of digits.

Learn the ten sound rules once, and any number becomes a picture:

• 47 → r · k → rake
• 32 → m · n → moon
• 314 → m · t · r → motor (the start of π)

This module has three missions:

1. How the Major System works — the ten digit→sound rules, the "sound not spelling" principle, and how to chain digits into words and use them as memory pegs.
2. Single-digit pegs (0–9) — a ready-made peg word for every digit.
3. Double-digit pegs (00–99) — a full 100-word peg list, the classic backbone for memorizing long numbers two digits at a time.
4. Peg groups by ten — learn that 100-word list a decade at a time, each group chained by an example story so the ten words (and their order) stick together.

The peg words follow a widely-used community list from the Art of Memory forum, chosen for imageability (concrete, picturable nouns stick better — Paivio's concreteness effect), with the classic single-digit pegs. The technique itself is described on Wikipedia.