Valid Attic characters can be classified.
There are five (5) vowels and sixteen (16) consonants including the aspirate (rough breathing), a total of 21 alphabetic characters.
| Character | Type of character |
|---|---|
| A | vowel |
| B | consonant |
| G | consonant |
| D | consonant |
| E | vowel |
| Z | consonant |
| Q | consonant |
| I | vowel |
| K | consonant |
| L | consonant |
| M | consonant |
| N | consonant |
| O | vowel |
| P | consonant |
| R | consonant |
| S | consonant |
| T | consonant |
| U | vowel |
| F | consonant |
| X | consonant |
| H | consonant |