<prompt> Translate the following text to SwahiliOne begins with the view that the postal system is a vertically integrated network involving the collection, sorting, transporting, and final delivery of mail.  <response>: Mfano mmoja ni ule wa mfumo wa posta kuwa mfumo uliounganishwa kwa njia ya wima unaohusisha kukusanya, kuchagua, kusafirisha, na kupeleka barua. 