CDI, CDi, CD-i, or .cdi may refer to:
CDI College is a private college in Canada. Established 1970 as Toronto School of Business, it offers programs in the business, technology and health care fields.
cdist is a free software configuration management system, which declares to adheres to the KISS principle.
CDI Corporation is a multinational company providing engineering, information technology and staffing services to clients in a range of industries including energy, chemical, aerospace, defense, transportation and financial services.
The CDIO Initiative (CDIO is a trademarked initialism for "Conceive Design Implement Operate") is an educational framework stressing engineering fundamentals set in the context of conceiving, designing, implementing and operating real-world systems and products.
CDP-diacylglycerol—inositol 3-phosphatidyltransferase is an enzyme that in humans is encoded by the CDIPT gene.
CDisplay is a freeware Comic book archive viewer and sequential image viewer utility for Microsoft Windows used to view images one at a time in the style of a comic book.
Cdigix, formerly known as Cflix, was a digital media provider for institutions of higher education. The company ceased operations at the end of 2008, citing the difficult economic times.
Clostridium difficile infection (CDI) is a symptomatic infection due to the spore-forming bacterium, Clostridium difficile.