MB3

MB3 may refer to:


 * MB 3, a dwarf galaxy
 * Thomas-Morse MB-3, biplane
 * Moonbase 3, a British science fiction television programme in 1973
 * MB3, mountain bike model manufactured by Bridgestone
 * MB3, Molecular Biology, Biochemistry and Bioinformatics, Towson University Jess and Mildred Fisher College of Science and Mathematics
 * MB3-number (e.g. MB3-214, MB3-529, etc.), any of several Microsoft exams