[Koha] Koha operation

[Harvey Lee]

Hi,

I've got a few questions on Koha operation.

1. When defining branches under the Systems Preferences page; what are 
'branch categories' used for?

2. When adding borrower records, what is the significance of a 'Junior Member'? 
How is this different from a 'normal' borrower record? How is this linked/related to 
the 'parent' member? The coding seems rather simple but I'm not sure I understand
the intent of this member type.

3. How does one delete the biblios that are entered into the breeding farm? 
Or is this not required?

Thanks for your help,
Lee