A location is a standalone building with an address of its own where inventory is stored. Examples include a company's headquarters, a plant, an offsite warehouse, a hospital, a clinic, or a retail outlet.

A room is a site within a location. Locations typically have various rooms where inventory is stored. Examples include a storeroom, a warehouse, a supply closet, a patient room, or an exam room. Rooms can also be narrowed down more granularly, for example, "Storeroom 1, Rack A", "Storeroom 1, Rack B" or "Rack D, Shelf 3".

A user is an individual that is registered within the Scan IM app that has a unique email and password.

A unique item is a specific inventory item that has a distinctive identifier (product number, SKU, UPC, etc.) and description. The item quantity does not affect the unique item entry count nor will having unique items in multiple rooms and/or locations. For example, you can have 100 blue pens all with the same identifier located in a supply closet and a storeroom, which would count as one unique item entry.