Aum (also Om, ?) is the most sacred syllable in Hindusim. It is also considered holy in Buddhism - where it is incorporated in the most famous mantra "Om Mani Padme Hum" - as well as by Jains and Sikhs.
The word derives from the Sanskrit. The Om is the primordial sound by which the earth was created. It is interesting to relate this to the Gospel according to John.
"In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him" John 1:1-3.
That is exaclty the kind of thing I was hoping to find on this Harmony exercise looking, for once, at simlarities rather than differences.