How many rights in the system?(user,malladmin and other?)

I want to know there are how many rights in system? I just see “user” and “malladmin”,only the malladmin can login backend,but now I want to another role can login backend.How can I do ??
I really need a help, thank you.


get enterprise edition or a module like this one:

Rights / Roles for backend-users is a basic feature in Enterprise-Edition. But there are some modules out there as well.