Deltanet is an integrated double entry accounting system that operates with conventional user interfaces. The accounting package emphasizes invoice production along with sales reporting and purchase order generation with vendor history. The customer data base has 5 open fields for addresses and the item data base has 5 open fields for invoice item tax percents. The accounting modules include: A/R, A/P, general ledger, invoicing, purchase orders, inventory, and payroll. Built-in email support is now offered.