| Abbreviation | Definition |
|---|---|
| CIPA | Canadian Information Productivity Awards |
| CIPA | Certified International Projects Auditor |
| CIPP | Certified Information Privacy Professional |
| CIS | Certified Instrument Specialist |
| CIS | Certified IPC (Institute of Printed Circuits) Specialist |
| CISA | Certified Information Sytems Auditor |
| CISM | Certified Information Security Manager |
| CISOB | Councellor Incorporated Society of Organ Builders |
| CISP | Certified IRA Services Professional |
| CISSN | Certified Sports Nutritionist from the International Society of Sports Nutrition |
| CISSO | Certified Information Systems Security Officer |
| CISSP | Certified Information Systems Security Professional |
| CITP | Chartered Infornation Technology Professional |
| CJEA | Citi Journalistic Excellence Award |
| CL | Certified Linguist |
| CLHMS | Certified Luxury Home Marketing Specialist |
| CLI | Certified Legal Investigator |
| CLLM | Certified Laundry & Linen Management |
| CLOA | Certificates of Land Ownership Award |
| CLP | Certificate of Legal Practice |