CIW - Ciw Online

CIW has multiple meanings:

• California Institution for Women, a state prison in the USA
• Canadian Index of Wellbeing, that measures the wellbeing of Canadians over time
• Carnegie Institution of Washington
• Chicago and Illinois Western Railroad
• Central Indiana and Western Railroad
• Certified Internet Web Professional
• Coalition of Immokalee Workers
• Computational Intensive Workload
• ISO 639 language designation for Southwestern dialect of the Anishinaabe language, often called the "Chippewa language."