Comment by Archelaos

It should also be noted that a difference is often made between alphabets in the strict sense, where consonants and also vowels are represented by distinct symbols, and alphabets in the wider sense, where this is not the case (vowels are not represented at all or occasionally by certain consonant symbols typically when clarification is necessary). A writing system where symbols denote larger units of speech is not called an alphabet, but a syllabary. If it does not represent phonetic, but semantic units, it is called a logographic script. There are of course all kinds of mixed forms ("I ♥ NY").