I'll create new ones because just for me, its so hassle
        
             
        
        
        
A primary key is the answer. =)
        
             
        
        
        
Answer: your books and the ones you are given access to. 
Explanation: quickbooks goes from day to day bookkeeping to month and year end financial reports and tax filing. businesses use to manage daily sales and expenses and also keep track of daily transactions. They can involve or outsource bookkeepers or choose to run in-house operations. In doing this they would have access to all their books or decide to give virtual access to their outsourced bookkeeper/accountant. Quickbooks has multiple features concerning user access and privacy. A quick books user, in this case the business, can restrict access for each user it decides to add. The user can decide to give free access to all books or decide to restrict to a few files. Example, the business may add an accountant as one of its users and decide to restrict the accountant to its payroll files, depending on the agreement. 
 
        
             
        
        
        
Answer:
"A set is an unordered collection. A dictionary is an unordered collection of data that stores data in key-value pairs."
Explanation:
Set =>
Collection of non-repetitive elements.
Unordered
Unindexed
No way to change items.
Dictionary =>
Collection of key-value pairs.
Unordered
Indexed
Mutable