Purportedly the secret name or abbreviation of the deity in Greek mystery cults, but this could feasibly be a misprision garnered from the gnostic use of Iao.
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Notwithstanding the defunding of TIA and the closing of the IAO, several TIA projects continued to be funded under the classified annexes to the Defense and the Intelligence appropriation bills in 2003 and subsequently.
The IAO caught the attention of many conspiracy theorists because of its use of the pseudo-Masonic eye-in-pyramid symbol in its original logo.
In addition, "Iao" is another name for a gnostic supreme deity and sun-god, the Demiurge which is purportedly referred to in Masonic ritual.
IAO is considered to be both a gnostic godform and a magical formula.
IAO (iota, alpha, omega) was the Greek form of the Tetragrammaton, IHVH (Yod-He-Vau-He, or Jehova, the “Bringer of Light”), the Hebrew divine name for God.
Ceremonially, IAO can be illustrated by the act of “robing yourself as a king, then stripping and slaying yourself, and rising from that death to the Knowledge and Conversation of the Holy Guardian Angel” (Crowley, 1997).