None (nonexistent entities)

"None" refers to the absence of a value or the lack of a specific entity. It indicates that something does not exist or is not present in a given context. For example, if a search for a person’s middle name returns "None," it means they do not have a middle name recorded. In programming, "None" often signifies that a variable intentionally has no value assigned to it, serving as a placeholder for "nothing" or "no data." It helps distinguish between an empty or uninitialized state and actual data.