There are Three roles which have managerial tasks with regards to a store:
Superadmin: He or she is responsible for all instances of PUBNiTO which is the platform behind KNiTO.
Storeadmin: He is she is responsible for your instance of the store. This includes layout of the store front, as well as definition of subjects (or categories), languages, acceptance of a new vendor, control of adherence of vendors to the stores terms, and copyright infringements, and release of new books into the store.
Vendor: We expect most of the books which are added to the store to be done so by vendors. These are companies (or individuals) who have the right to distribute one or more publishers' books.
Publisher: They are the holders of all copyrights. However, their interests are maintained via vendors. So, if a publisher prefers to have control over all matters in the store, it must become vendor of its books.