Relationships checkbox in Product Master (COMMPR01)

Hi Experts,

Can anybody let me know what this each of this tab means in Product master (COMMPR01)

In relationships check box, there are as many as 7 sub screens -

1) Accessories

2) Customers

3) Content Provider

4) Manufacturer

5) Vendors

6) SERVI/S

7) SPARE/S

I explored for Vendors sub screen and looks like this acts as a SOS while creating SC.

But i am looking at other options and where it is applicable.

Any help welcome

Thank You

Abhinandan