N.P.I. was Pietro Mazzocchin from Bassano del Grappa, Italy.
In the early 80s Pietro Mazzocchin was very active in the industrial/noise scene. He released several cassettes under different moniker: Swastika Kommando, The New Sadism, Observation Clinique, N.P.I. and also as Lyoto Music together with Pierpaolo Zoppo of the legendary Mauthausen Orchestra. Some of his tapes were published by Broken Flag (UK), Recloose Organisation (UK) and Aquilifer Sodality (Italy). Many tapes were also self released.