What does MASU stand for?

Machined Surface

MAT Transport - Intermodal shipping container symbol (TVRC)

Mediterranean and African Society for Ultrasound (SAUO)

Mediterranean and African Society of Ultrasound - France (BUAC)

Mesoamerican Archaeology Study Unit - American Topical Association (EA)

Metal Alloy Separation Unit

Mid-Atlantic State University

Mobile Army Surgical Unit

Multiple Acceleration Sensor Unit (PDAA)