Factual error: While eating, General Haggarty was told about how Conway should be a cook. Haggarty said "Change his (Conway's) MOS. MOS means Military Occupational Specialty, your job in service. Since M*A*S*H was set in the early 50's, Haggarty wouldn't have said that, because 'MOS' wasn't used until 1965.
Suggested correction: "MOS" most certainly was used during the Korean War. In 1965, the MOS system was simply changed, not created.
I perhaps misspoke. It was titled PMOS, and revamped in 1965 as just MOS. My apologies and thanks for the info.
According to "Introduction to Special Regulations SR 615-25-15, Enlisted Personnel Military Occupational Specialties" from the Department of the Army in November 1950, it's MOS. The "P" just means primary, but MOS was/is used way more than PMOS.