👉 The term "backstring" is a concept in computer science, specifically related to algorithms and data structures. It refers to a string that represents a sequence of characters that are not part of a larger whole. In other words, it's a way of representing strings that contain multiple characters, but the order or structure of those characters does not matter. This can be useful when working with large sets of data, as you don't need to keep track of each individual character in memory at all times.