[labster]

Uppercase MB is megabytes, lowercase mb is millibars. Both can go through a series of tubes, but millibars are also useful in dump trucks, to make the wheels go round and round.

[IshKebab]

Millibars is mbar not mb.

[labster]

I’m a meteorologist. Most of the time no one bothers to spell out mbar, and just uses mb in both scientific papers and operational data.