ZD

Zd or ZD may refer to: Nissan ZD engine, an automobile engine Zero Defects, a management program to eliminate defects in industrial production, popular in American industry in the late 1960s Zero-defects mentality, in which a command-and-control structure does not tolerate mistakes Zertifikat Deutsch, a certificate of German language ability Ziff Davis, a magazine publisher and Internet information provider Zooey Deschanel, an American actress and musician