The Fifth International Workshop on Persistent Object Systems took place in the historic setting of Centro Studi "I Cappuccini" della Cassa di Risparmio di San Miniato. San Miniato (pisa). Italy from 1-4 September 1992. The workshop continued the tradition of the previous four in concentrating on the design. implementation and use of persistent systems. The other workshops in the series are: Venue Date Organisers Appin POSI 27-30 August Atkinson. Buneman 1985 Scotland and Morrison Appin POS2 25-28 August Atkinson and Morrison 1987 Scotland Newcastle POS3 10-13 January Koch and Rosenberg 1989...