The Update Pick List Menu will allow you to maintain the pre-populated lists that contains the lists you see in the menu list above. These list are referenced to the Items List (your inventory list). Notice that each list has a shortcut key.

What is a relational database?

Relational database - means data from each list is related to an item once it is entered. Thus you can not delete a category or retailer or location, etc without deleting (or changing the data) for all item records that used that category, or other data from one of the Pick List. Thus it eliminates the possibility of deleting for example an item named "Sofa" from the Item Name list because it is referenced in your inventory as you owning it. It also means that correcting spelling errors is easier. If you correct the name in the Pick List then every record in your Item inventory list will also be corrected. Duplicate names are not allowed in the Pick Lists, such as having multiple entries for example using word "Kitchen".