IV. OM
There is no translation of OM. It consists of three letters: A,U and M. It signifies the three periods of time, the three states of consciousness and all of existence. A ist the waking state, U ist he dreaming state, and M ist he deep sleep state. OM contains nada and bindu. Nada ist he prolonged vowel sound and bindu is the humming sound, made with closed lips, with which the Mantra ends. All Mantras are hidden in OM, which is the abstract, highest Mantra of the Cosmos.
VIII. Hari OM / OM Vishnu
Hari is another name for Vishnu. It is that aspect which forgives the past actions of those who take refuge in him and destroys their negative deeds. Thus Hari is a redeemer and guide to personal salvation as well as the world Preserver
www.meditation-for-avatars.net/the_meaning_of_mantras.htm
Hari Om
Within me
Within my soul
On your
Angel spread wings
That I roam
Shistas transcendental
Traveling
Lunar lingerings
To our Som
Om Mani Padme Hun
A Home within an Om