Changes

In many cases, the modern phonetic values of the letters match the pronunciation of the initial letter (or letter clusters) of their names in English. However, some letters have shifted in pronunciation since ancient times, so this is not always the case. For example, in Ancient Greek, the letter beta was pronounced like the Latin letter B, whereas in Modern Greek it is pronounced like the Latin letter V.<ref>http://www.omniglot.com/writing/greek.htm</ref>

In many cases, the modern phonetic values of the letters match the pronunciation of the initial letter (or letter clusters) of their names in English. However, some letters have shifted in pronunciation since ancient times, so this is not always the case. For example, in Ancient Greek, the letter beta was pronounced like the Latin letter B, whereas in Modern Greek it is pronounced like the Latin letter V.<ref>http://www.omniglot.com/writing/greek.htm</ref>

Digraphs can be formed to signify sounds not covered by the main alphabet (e.g., ντ for /d/), or to represent diphthongs (e.g., αυ for /af/ or /av/).

Digraphs are formed to signify sounds not covered by the main alphabet (e.g., ντ for /d/ and μπ for /b/), or to represent diphthongs (e.g., αυ for /af/ and ου for /u/).

==Obsolete letters==

==Obsolete letters==