Configure Units and Accounts
            You can create a pre-defined list of 
product units, e.g. "kg" "litres" "hours". This makes it easy to select a Unit when editing a Product, and avoids retyping unit names each time.
            You can also define a list of 
Accounts.
            You can use this simply to register payments in different 
bank accounts or by Cash or Paypal, etc... 
            Or you can use accounts for 
Accounting Classification, i.e. to sort and store transactions in your company's general ledger. In this case you can attribute a 
Code to each Account.
            
            To configure Units and Accounts, goto the Sales web app Options menu / 
Catalog and 
Accounts tab.
            Click on New Unit or New Account.
            Click on an existing Unit or Account to edit or delete it. You can also delete all Units at once with the Delete menu.