Glagolitic alphabet   This article states that the Glagolitic alphabet was devised by C  M  However the Wiki page on Glagolitic alphabet httpenwikipediaorgwikiGlagoliticalphabet contradicts this statement by saying that the Glagolitic alphabet preexisted the arrival of C  M  I think that at most we can say that C  M REvised not DEvised the alphabet to include sounds for the Slavic language