QUOTE
Remember the LXV signs,and the ledgend of Isis and Osirus.
It is also:
I Isis
A Aponphis (spelling sorry)
O Osiris
Bascially the modern day interpertation is growth, death, and resurrection as something greater than before.
It is also listed in the Chaldean oracles as a Phonecian name for God and the gnostics held it was the highest name for god.
There is also an excellent article in the Journal of Western Mystery Tradition by Alex Summers that links IAO to the middle pillar through the hexagram.
It has far more implications. That only years of study will gleam for you and would be impossibe to put into words even if I did fully understand it myself.