CIH

CIH or cih may refer to:

• CIH (computer virus), also known as Chernobyl and Spacefiller
• CIH Bank, a wholly owned subsidiary of the Moroccan Caisse de dépôt et de gestion
• Capricorn Investment Holdings, a southern African umbrella for the Capricorn group of companies
• Certified Industrial Hygienist, professional credential for occupational hygienists in the United States
• IATA code for Changzhi Wangcun Airport
• The Chartered Institute of Housing, a UK-based professional society
• ISO 639-3 code for the Chinali language
• Opel cam-in-head engine, a series of vehicle engines
• Chromogenic immunohistochemistry
• Corpus Iuris Hibernici, compilation of sources for early Irish law