What are the main types of enterprises in the consumer electronics industry? thank you

Now many pcb designers are also involved in production, and many pcb manufacturers are also involved in design, that is, odm. It turned out to be an OEM.

Sales have not changed, including retail and agency (components and products).

But many ic factories already have production, design and research and development, but only research and development, no production! Mainstream IC manufacturers pay equal attention to design and production! For example, Intel, of course, also makes custom ic. This is a fabless company without a factory, but its market share is not high, up to 20%.