2 types of lists exist : Central and User.
Details of a list (display on Astore):
A user list is created by a user of the hotel.
It can be duplicated, shared to other users from the same hotel (as a copy), and deleted (only if you are the creator of the list).
A central list is created by the Central purchasing department and shared to one or several brands of the group (all the users of a same hotel can see the central list).
Contrary to the user list, the central list could only be duplicated to be used as a base for your own list (the duplicated list could then be shared to the users of the same hotel).