SystemDb_Ext(SystemE, "Mainframe Banking System", "Stores all of the core banking information about customers, accounts, transactions, etc.")

System_Boundary(b2, "BankBoundary2") {
  System(SystemA, "Banking System A")
  System(SystemB, "Banking System B", "A system of the bank, with personal bank accounts. next line.")
}

System_Ext(SystemC, "E-mail system", "The internal Microsoft Exchange e-mail system.")
SystemDb(SystemD, "Banking System D Database", "A system of the bank, with personal bank accounts.")

Boundary(b3, "BankBoundary3", "boundary") {
  SystemQueue(SystemF, "Banking System F Queue", "A system of the bank.")
  SystemQueue_Ext(SystemG, "Banking System G Queue", "A system of the bank, with personal bank accounts.")
}