Substances used to wear away a surface by friction. Accessories: 

  Chemicals that are added to the engine, cooling system, air conditioning system or transmission to maintain or enhance performance. Appearance Products: 

  Businesses specializing in electrical and lighting products for commercial vehicles. Auto Care Market Distribution Segment:

  The maintenance, repair, parts, accessories, chemicals and fluids for vehicles after their original sale. This term often refers only to the auto care market for cars and light trucks. Auto Parts Stores:

Firms whose primary activity is motor vehicle collision repair. Buying Group:

 Corporate Average Fuel Economy. These standards set requirements on automakers for improving the average fuel economy for new light-duty vehicles. Captive Jobbers:

 Establishments that primarily sell new or used automobiles. They usually have a service and parts department either on premises or at another location. Carrier:

 A business discipline where vendors and retailers work together in the management of product categories in order to streamline operations and increase sales. Chain Stores:

 Compact, self-service retail stores that are open long hours and carry a limited line of brands and sizes, possibly including gasoline. Examples include 7-Eleven and Circle K. Core:

 Salesperson at a retail or jobber outlet responsible for looking up parts and handling customer needs. Department Stores: