MIAB

MIAB may refer to:


 * Magnetically Impelled Arc Butt, a type of welding process
 * Member of the International Association of Book-keepers
 * Message in a bottle, a form of communication whereby a message is sealed in a container and released into a body of water
 * mind.in.a.box, an Austrian electronic music band
 * Music Industry Association of Belize, an organization formed by Ivan Duran
 * Magnesium-ion aqueous battery, a magnesium-ion battery with water-based electrolyte