Codes & Symbols
Noah John Rondeau was always writing. He kept a daily diary and also wrote letters to many people.
After a few years of writing in his diary, Noah created a special code to use for his daily entries. He also used special symbols in many of the letters he sent to people. You can see an example of a letter here.
A code is a system of symbols or signals used in place of letters and numbers, often used to keep information secret.
A symbol is a letter, character, or image that stands for something else.
A pictograph is a symbol or drawing used in place of a word.