2xxx

2xxx is not a single term with a definite meaning. Rather, it is a four-character string that begins with the digit 2 and is used in multiple contexts to denote a range or a placeholder rather than a specific value. In calendrical use, 2xxx commonly signals a year in the 2000s, meaning any year from 2000 through 2999 in informal notation. In data handling and templates, 2xxx is employed as a placeholder for a four-digit number when the exact digits are unknown, masked, or to be filled later. It appears in example data, form fields, and documentation to indicate a generic four-digit code.

In technology and product naming, manufacturers may use a prefix like 2xxx to designate a series of models or components. The precise features and release dates depend on the manufacturer and product line; 2xxx here is a naming convention rather than a fixed model. In mathematical or programming contexts, 2xxx may be used in dummy literals or to illustrate patterns that begin with the digit 2.

Because of its generic nature, the meaning of 2xxx must be inferred from context. If encountered in a document, readers should look for adjacent terms or a legend that clarifies whether it refers to a year, a code, or a model series. See also four-digit year, placeholder, product series naming.