Some of the most ancient of religions have given it a name, the Akasha, the Book of Life. We now think of it as the quantum hologram, the Universal Supercomputer, the Mind of God. It is the universal memory, a record of all events that have ever occurred, imprinted on the fabric of space-time.
The original concept of the Akashic records comes from the Vedic scriptures, Akasha roughly meaning 'space' or 'aether'. (see Wikipedia article: http://en.wikipedia.org/wiki/Akashic_records). It originates in Hindu Samkhya philosophy, handed down through Hindu and Buddhist teachings. In the late 19th century, it was popularized by writings of Madame H.P. Blavatsky, founder of Theosophical Society
In Semitic (Judeo-Christian) religions, the analogous concept is The Book of Life, containing the record of the good and evil deeds of each person. Revelation Chapter 20:12 (NIV) states, "And I saw the dead, great and small, standing before the throne, and the books were opened. Another book was opened, which is the Book of lLife. The dead were judged according to what they had done as recorded in the books."
In the early 20th century, Edgar Cayce, Christian mystic and clairvoyant reader, described access to the Universal Hall of Records in multiple readings. Cayce's readings contain numerous notes on the nature of the records and their access (see www.edgarcayce.org). A quote from the ARE website provides the ultimate summary of Cayce's description of the Akashic Hall, "The Akashic Records contain the entire history of every soul since the dawn of Creation. These records connect each one of us to one another." (http://www.edgarcayce.org/are/spiritualGrowth.aspx?id=2078).
What is the physical mechanism behind the Akashic Records? Only in the 20th Century did we begin to understand the concept the quantum hologram. Quantum physics and zero-point theory describe how every event in space-time ultimately interconnects with every other event. This happens through a mathematical process called quantum nonlocality (a long, involved topic - See Michael Talbot, The Holographic Universe for a great explanation). Physically, this occurs through nonlocal information transfer in the zero-point field, the background of quantum interactions occurring at the most fundamental level in the fabric of space-time.
Edgar Mitchell, in his paper entitled, Nature's Mind, the Quantum Hologram (http://www.edmitchellapollo14.com/naturearticle.htm), described the zero point field and how consciousness interacts with the quantum hologram. He describes how the quantum hologram contains the essence of reality. Thus, we can think of this Akashic field as the medium for the superconscious, or the universal mind.
Ervin Laszlo, in his book, Science and the Akashic Field, described what he called the A field, equivalent to zero point field. In several books on the Akashic field, he describes how this concept explains many of the mysteries of modern physics, cosmology, consciousness studies, etc.
Throughout history, seers and philosophers have claimed that access to the Akashic records was an advanced practice. The oldest masters taught that it would take years of meditation, study and discipline to achieve the ability to enter the Akashic hall. Yet many others, beginning with Edgar Cayce, described how one could access the records through meditation, setting aside the conscious mind and allowing the superconscious to come through. As meditation becomes more common and meditators become more skilled, the Akashic hall has become open to ever more seekers.
In my view, the Akashic field is a spiritual or psychic mind-field, the ultimate field-consciousness. It is accessible to anyone who can go into deep meditation or hypnosis. Anyone who can set aside the ego-level of mind and access their own sub/superconscious, can access the hall of records. Typically, access to the superconscious is a spiritual/metaphysical process. For many/most seekers, the language of the spirit is metaphor. Accordingly, we can use a metaphorical journey to access many different spiritual realms.
We can think of a Library as an archive of information from many sources, which we may or may not otherwise have access to. And the ultimate case of this is the universal archive of memory, infinite storehouse of knowledge known as the Akashic library - storehouse of all knowledge. In the script In the Akashic Hall, we have the image of an endless hall of doors, at least one leading to the correct room in the library.
Going deep into trance, we can enter and observe the hallway, seeing the hall of doors stretching to infinity. The subconscious will know which door is the correct one. Stepping across the threshold into library, we can find the correct book and open it to the location containing the desired knowledge, the answer to that specific question.
Several traditions (http://www.akashictransformations.net) describe keepers of the Akashic Records, spiritual beings assigned to protect the records and to help the seeker find the information they are looking for. There are any number of traditions to describe keepers, guardians, guides, etc. Again, in my view, any specific descriptions are probably metaphorical.
In In the Akashic Hall, we can imagine a single teacher - representing the keepers, guides or guardians in any number of traditions. The teacher helps the seeker to find the information, then to follow-up with questions, continuing to study the records until reaching a point where they can (temporarily) conclude their search.
We live in an endless sea of knowledge, endless resources, endless possibilities for understanding in an infinite universe. The sea of knowledge is infinite while our own understanding must always be finite. Thus, the possibility of endless visits to consult the Akashic records offers us access to whatever understanding we seek. As our understanding grows, as our psychic/spiritual horizons expand, we may find ourselves visiting the records ever more frequently - consulting the teachers, following the trails of knowledge from question to answer to the next question and so on.
Ultimately, we find ourselves with the resources of infinite access, the infinite knowledge, unlimited possibility - an entire universe recorded In the Akashic Hall.
Somewhere, locked within the very fabric of space-time is the memory of everything anyone has ever done, said, or even thought. Like the ultimate video recording, it is a record of every event in an eternal, infinite universe. It is a concept as old as humanity and now, in modern physics and among present-day seers, it is once again re-emerging as a key to understanding the universe.