CSIW
| Acronym | Definition |
|---|---|
| CSIW | Corrugated Substrate Integrated Waveguide (microwave theory) |
| CSIW | Cognitive Strategy Instruction in Writing |
| CSIW | Centre for the Strategic Initiatives of Women (Washington, DC) |
| CSIW | Care Standards Inspectorate of Wales |
| CSIW | Cracked Steam Installation Wizard (software) |