1. Simple Substitution Cipher:
This is a type of encryption where each letter in the plaintext is replaced by a different letter based on a fixed key. This is often referred to as "letter-for-letter substitution" or simply "substitution cipher".
2. Letter-to-Number Mapping:
This refers to the common practice of assigning numerical values to letters, often used in cryptography and coding. For example, A=1, B=2, C=3, and so on. This is also sometimes referred to as "alphabetic numbering".
3. Phonetic Alphabet:
This is a system of pronunciation guides used for spelling out words over communication channels, especially in cases where clarity is essential. Each letter of the alphabet is represented by a unique word.
4. Alphabetic Order:
This refers to the arrangement of letters according to their standard sequence in a particular alphabet.
5. Corresponding Letters:
This term can be used to refer to letters that have a similar sound or appearance in different alphabets. For example, the English "C" and the Russian "Ц" both have a similar sound.
To clarify what you are asking, please provide more context or an example of how the term "alphabetic correspondence" is being used.