Sergeant First Class (SFC)

Petty Officer First Class (PO1)

Private First Class (PFC)

First Sergeant (1SGT)

Single Fuel Concept (SFC)

specific fuel consumption (SFC)

first fire mixture / first-fire mixture

airman 1st (2nd, 3rd) class

class

class of supply

lead ship / name ship / class leader

military load class (MLC)

NATO Supply Class

Ohio-class submarine

ship class

class I A supplies (air/inflight rations)

class I supplies

class IX supplies (Repair parts and components)

class VII G supplies (Electronics)

class VII N supplies (Special weapons)

fume class

aggressive-class minesweeper

Astute-class submarine

forward class III supply point

aerodrome class

third-class road

CLASS I (< 150 KG) micro, mini or small drones

CLASS II (150-600 KG ) tactical

CLASS III (>600 KG) strategic UAVs

battalion sergeant major

chief master sergeant

Command Sergeant Major

covering sergeant