In CATIA, a "Part" is a digital representation of a physical object, which can be a single component or an assembly of multiple components. A Part can be created from scratch, imported from other CAD software, or derived from existing parts.

A "Product" in CATIA is a collection of Parts and/or other Products, which are combined together to create a complete system or machine. Products are created by assembling various parts and components together and arranging them in a specific hierarchy.

A "Component" in CATIA is a smaller part or sub-assembly that makes up a larger assembly. Components can be created independently and then inserted into an assembly or created within the context of an assembly. Components are used to build up larger assemblies, such as a machine or a vehicle.

Here's an example of how the terms "product," "component," and "part" might be used in CATIA:

Product:

In CATIA, a "product" generally refers to an entire assembly or system made up of multiple components. For example, if you were designing a car, the "product" might be the entire vehicle, including the chassis, engine, wheels, seats, and so on. In CATIA, you would typically create a new product file to house all of the components that make up the car.

Component:

A "component" in CATIA refers to a sub-assembly or part that makes up part of the larger product. Continuing with the car example, some components might include the engine, transmission, suspension system, and so on. Each of these components would be designed as a separate file within the larger product file.

Part:

In CATIA, a "part" typically refers to a single physical object that will be manufactured or produced. For example, a part might be a bolt, a gear, a bracket, or a body panel. Each part would typically be designed as a separate file within the component or product file.

To summarize:

Parts are individual digital representations of physical objects

Products are collections of Parts and/or other Products arranged in a hierarchy to create a complete system or machine

Components are smaller parts or sub-assemblies that make up a larger assembly.