The United States Air Force has many authorized duty identifier tabs (which are worn on an individuals left sleeve), including Bomb Builder, Fire Fighters, Explosive Ordnance, Combat Controller, Contingency Response and Air Mobility Liaison Officer.
Authorized duty identifier tabs (worn on left sleeve) Fire Fighters Explosive Ordnance Disposal Combat Controller Contingency Response Chemical, Biological, Radiological, Nuclear Advanced Air Advisor Tab (Authorized for permanent wear) Air Advisor Tab (Authorized for permanent wear) Air Mobility Liaison Officer Combat Aviation Advisor (Tab version authorized for permanent wear) Combat Rescue Officer Deployable Aircraft Ground Response Element Force Protection Forward Area Refueling Point Joint Air Component Coordination Element Office of Special Investigations Medical Pararescue Security Forces Special Tactics Officer Survival, Evasion, Resistance and Escape Tactical Air Control Party Tactical Call Sign (e.g. A01) 
