A concept from Indian metaphysics, this is a gigantic repository containing the memories of every incarnation of every being that has ever existed.
Some gifted people were said to be able to "read" these records, and thus gain insight into past events or experiences.
"The tribune's words howled and scattered to the four winds. A people sheltered within his voice. Dead noise. Akasic records of all that ever anywhere wherever was."
-- James Joyce