The following Product Service Codes (PSCs) are commonly associated with NAICS 621910, Ambulance Services

PSC V225 Transportation/Travel/Relocation—Travel/Lodging/Recruitment: Ambulance

Top Result Services

PSC F003 Natural Resources/Conservation—Forest-Range Fire Suppression/Presuppression

Services

PSC V221 Transportation/Travel/Relocation—Travel/Lodging/Recruitment: Passenger Air Charter

Services

PSC 6615 Automatic Pilot Mechanisms and Airborne Gyro Components

Products
Federal Category 5.4: Industrial Products & Services Test & Measurement Supplies

Includes
Automatic Pilot Regulators; Directional, Vertical, Bank and Turn, and Hydraulic Surface Gyro Controls; Airborne and Shipborne Automatic Pilot Mechanisms; Helicopter Automatic Stabilization Equipment.

Excludes
Automatic Pilot Training Devices (FSC 6930); Automatic Pilot Mechanisms, Guided Missile (FSC 1420).

Notes
Included in this class are gyro components of guided missiles. Excluded are complete gyro mechanisms and nonairborne gyro components, both of which are classified in the same classes as their next higher assemblies.

Possible NAICS Codes
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
488190 – Other Support Activities for Air Transportation
334516 – Analytical Laboratory Instrument Manufacturing
339112 – Surgical and Medical Instrument Manufacturing