PIANO
| Acronym | Definition |
|---|---|
| PIANO | Professional Innkeepers Association of New Orleans (Louisiana) |
| PIANO | Prague International Anti Nuclear Office (Prague, Czech Republic) |
| PIANO | Pesky Instruments Advances New Operative (Kids Next Door show) |
| PIANO | Paraffin, Isoparaffin, Aromatic, Naphthene, or Olefin |
| PIANO | Propulsion Integration of Aero-Control Nozzles |
| PIANO | Photo-Induced Adequate Nitric Oxide (urology) |