There is no MOS of 94B in the current organisation. It may have existed prior to 2004, but doesn't now. 94 is the Electronics Maintenence and Calibrations CMF, although it may have been something completely different prior to 2004.
The "3" is a Skill Level Identifier, indicating that they were at skill level 3, i.e., they held the rank of Staff Sergeant. The "H" is a Special Qualifications Identifier, in this case, indicating that they are qualified as an instructor.
It is MOS 1141.
MOS stands for Military Occupational Specialty. You may hear MOS 68F or something else. Each job is assigned a MOS.
Mos Certification = Microsoft Certification
The 92F Mos is a petroleum supply specialist
MOS Burger was created in 1972.
The population of MOS Burger is 2,010.
The population of Alpha MOS is 73.
Alpha MOS was created in 1993.
Acorn MOS was created in 1981.
Mos Speedrun happened in 2011.
MOS Presents was created in 2004.
MOS Technology was created in 1969.