Requests/Holds at academic library vs public
I am used to the model of the public library wherein one places a hold for a title and is placed on a list. Do academic libraries differ from this model? I cannot request titles that are currently checked out. I can only request titles for pulling from another location.
I am familiar with significantly longer circulation periods at academic libraries but are there no holds lists to be added to? Is it standard practice for academic libraries to not have requests/holds for checked out materials? If this is the case, do you know the reason?