| I Com | Intermediate of Commerce |
| I SC | Intermediate of Science |
| IA | Intermediate of Arts |
| IAS | Indian Administrative Service |
| IBPS | Institute of Banking personnel selection |
| ICSE | Indian Certification of Secondary Education |
| ICT | Information and communications technology |
| ICU | Intensive care Unit |
| IEC | international Electro-technical commission, Importer – Exporter code |
| IFS | Indian Forest Service, Indian Foreign Service |
| IIT | Indian Institute of Technology |
| IMF | International Monetary Fund |
| IMO | In my opinion, International maritime organization |
| IMPS | Immediate Payment Service |
| INC | Incorporate or Incorporated |
| INDIA | Independent Nation Declared in August |
| INR | Indian Rupee |
| IPL | Indian Premier League |
| IPO | Initial Public offering |
| IPPB | India Post Payment Bank |
| IPS | Indian Police Service |
| IRS | Indian Revenue Service |
| ISKCON | International Society for Krishna Consciousness |
| ISO | International organization for Standardization |
| ISRO | Indian Space Research Organization |
| IT | Information Technology |
| ITC | Indian Tobacco Company, International Trade Center |
| ITI | Industrial Training Institute |
| IUC | Interconnect Usage Charge |
| IVR | Interactive Voice Response |
