| Acronym | Definition |
|---|
| PIW | Panstwowy Instytut Wydawniczy (Polish: Oxford University Press) |
| PIW | Poetry International Web (est. 2002) |
| PIW | Process Improvement Workshop |
| PIW | Put in Work |
| PIW | Petroleum Intelligence Weekly (magazine) |
| PIW | Period of Incapacity for Work (human resources management) |
| PIW | Public Interest Watch (Washington, DC) |
| PIW | Printing Industries of Wisconsin |
| PIW | Person In Water |
| PIW | Psychiatric Institute of Washington |
| PIW | Property Inspection Waiver (mortgage loans) |
| PIW | Prescribed Industrial Waste (US EPA) |
| PIW | Pounds Per Inch of Width |
| PIW | Pikwitonei, Manitoba, Canada (Airport Code) |
| PIW | Publicly Indexable Web (Internet) |
| PIW | Partnership in Wildlife (Nevada Department of Wildlife) |
| PIW | Paralegal Institute of Washington, DC |
| PIW | Project Initiation Workshop |
| PIW | Post Industrial Waste |
| PIW | PhotoCD Imaging Workstation |
| PIW | Patent Images on the Web |
| PIW | Panel of Inventors Worldwide |
| PIW | Parent Is Watching |
| PIW | Pounds per Square Inch Width |
| PIW | Parental Involvement Worker |