MB means middle blocker.
The letters MB CHb what does it stand for
In computer terminology it means Megabyte.
Microsoft Book
1000 Megabytes
MB stands for Mindless Behavior.
Masters of Business and science
MIB stands for most improved bowler.
Milton Bradley
KB and MB stand for kilobyte (1,024 bytes) and megabyte (1,024 kilobytes). They are units of measurement of the storage capacity of computer memory, hard drives, USB sticks, DVD ROMs, etc.
MB in weather stands for Millibars, and is a measure of pressure in the atmosphere.
There is a program Modeling Immunity for Biodefense (MIB).I hope that is what you are looking for.