| Abbreviation | Definition |
|---|---|
| HSSC | Harmonised System of Survey and Certification |
| HTCP | Highway Technician Certification Program |
| HTCP | Hockey Trainers Certification Program |
| IACS | Infosec Assurance And Certification Services |
| ICAB | International Certification Accreditation Board |
| ICCS | International Coin Certification Service |
| ICDP | Institute for Certified Divorce Planners |
| ICFE | International Certificate in Financial English |
| ICII | Internet Certification Institute International |
| ICQ | Inspection Certification Questionnaire |
| ICRM | Institute Of Certified Records Managers |
| ICS | International Certification Services |
| IGBC | Institute For Green Business Certification |
| IICA | Iranian Institute of Certified Accountants |
| IMCI | International Marine Certification Institute |
| INCC | Infusion Nurses Certification Corporation |
| IQCS | Incident Qualification and Certification System |
| IQCS | Incident Qualifications and Certification System |
| IRC | Inspection Release Certificate |
| ISCC | International Sustainability and Carbon Certification |