USDM is an acronym for "US Domestic Market". It is frequently (but not exclusively) used to discuss cars, especially to differentiate from the JDM (Japanese) version of an import vehicle.

Popular vehicles which are substantially different in their native market include:

• Honda Civic
• Nissan 240SX (out of production)

Popular vehicles which are basically identical to the original include:

• Nissan 300ZX
• Mitsubishi 3000GT (JDM name: GTO)

(Please send additional vehicle information in /msg to drinkypoo)