What does MBZ stand for?

Amoltepec Mixteco - Language code (ETLW)

Magnesia-Buffered Zinc Oxide (PDAA)

Mandatory Broadcast Zone - Telecommunications (DA)

Maues - Brazil - Airport symbol (AD)

MB Sports, Atwater, CA - Manufacturer code for watercraft hull identification number (USCG)

Menxel Bouzelfa - Tunisia - Seismograph station code, US Geological Survey (SEIS)

Middle Border Zone - Geology

Mobilize - Telegraphy (PCTE)

Must Be Zero (IAA)