In the context of gas, "mb" typically stands for "millibar," which is a unit of pressure. It is commonly used in meteorology and other fields to measure atmospheric pressure. One millibar is equal to 1/1000 of a bar, and it is equivalent to approximately 0.0145 psi (pounds per square inch).
The letters MB CHb what does it stand for
Microsoft Book
In computer terminology it means Megabyte.
1000 Megabytes
mb stands for middle blocker.
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.