The word "alphabet" comes from the first two Greek letters: alpha and beta.
Long ago in Greece, the first letter was called alpha and the second was beta. Put them together and you get "alphabet."
More facts about Alphabet
The English alphabet has 26 letters, from A to Z.
The Vietnamese alphabet has 29 letters and uses little tone marks.
The letters a, e, i, o, and u are called vowels.
The letter E is used more than any other letter in English.
The Khmer alphabet in Cambodia has 74 letters — one of the biggest in the world.