Plus-X

Plus-X or Plus X may refer to


 * Venus Plus X, a 1960 science fiction novel written by Theodore Sturgeon
 * "Plus X", a 1956 science fiction novella by Eric Frank Russell, later expanded into Next of Kin
 * +×, a logo for EDM artist Martin Garrix
 * +x, adding execute permission with the system call chmod as used in Unix-like operating systems.