In our current understanding, the Akashic Record is the oneness of everything where all is contained. It is the archive of all being. The Akashic Record energy is an expanding, living, breathing field. In ancient teachings, it has been referred to as the Book of Life. Traditionally, the Akashic Record can be considered to be a library, where an individual's records are considered to be a book within the library. Information retrieved and received from the individual's book is considered to be the sections of the book.
The Akashic Records are the individual records of a Soul from inception. At the moment we make the decision to experience life as an independent entity, there is a field of energy created to record every thought, word, emotion, and action generated by our experience. That field of energy is known as the Akashic Record. "Akashic", because it is composed of Akasha (the energetic substance from which all life is formed), and "Record", because its objective is to record all life experience.
From ARCI´s website