Zippering is a term used in the context of computer programming and data structures. It refers to a technique that allows for efficient merging of two or more sequences of data. By interleaving elements from each sequence, zippering creates a new sequence that maintains the order of the original data while combining them. This method is particularly useful in functional programming languages, where immutability is a key feature. Zippering can help manage complex data structures, such as trees or lists, by providing a way to traverse and manipulate them without altering the original structure.