As it happens, the term engram isn’t a Bungie invention. It’s a term used in neuroscience, and one that’s rather appropriately surrounded by plenty of scientific intrigue itself. In order to make sure only those antagonizing neurons were removed, he electrified various brain segments and asked the anesthetized-but-conscious patients what they felt. This inherent enigmatic nature of them, then, makes the use of the term engram in Destiny 2 rather perfect. Everyone playing Destiny 2 has been fighting to get the very best engrams, containing the rarest and most exhilarating “memories”, all this time.
Source: Forbes September 02, 2018 20:48 UTC