ZAM	Zone Announcement Message
ZBC	Zero-Bit Count
ZCM	Zone Convexity Message
ZIG	Z39.50 Implementor's Group
ZIG	Z39.50 Implementors Group
ZIP	Zone Information Protocol
ZLB	Zero-Length Body
ZLE	Zone Limit Exceeded
ZSK	Zone Signing Key
ZT	Zones Traveled
ZTL	Zones Traveled Limit