Mathematics •
Singleton (mathematics), a set with exactly one element •
Singleton field, used in conformal field theory
Computing •
Singleton pattern, a design pattern that allows only one instance of a class to exist •
Singleton bound, used in coding theory •
Singleton variable, a variable that is referenced only once • Singleton, a character encoded with one unit in
variable-width encoding schemes for computer character sets • Singleton, an empty tag or self-closing tag in XHTML or
XML coding
Social science •
Singleton (global governance), a hypothetical world order with a single decision-making agency • Singleton, a consonant that is not a
geminate in linguistics • Singleton, a person that is not a
twin or other multiple birth ==People==