| 項目 |
英語 |
| IAQ | indoor air quality |
| IC | integrated circuit |
| ICU | intensive care unit |
| ICカード | IC card |
| IDF | intermediate distribution frame |
| IDN | integrated digital network |
| IDカード | identification card |
| IEC | International Electrotechnical Commision |
| IEEE | Institute of Electrical and Electronics Engineers |
| IG541 | inert gas 541 |
| IG55 | inert gas 55 |
| INS | Information Network System |
| IO | input output |
| IPCC | Intergovernmental Panel on Climate Change |
| IPF | ice packing factor |
| IP電話 | IP telephony |
| IP電話機 | IP phone |
| IP表示 | - |
| ISDN | Integrated Services Digital Network |
| ISD公衆電話 | International Subscriber Dialling |
| ISO | International Standardization Organization |
| ISO14001 | - |
| ISO9001 | - |
| i-s線図 | i-s chart |
| ITU | International Telecommunication Union |
| ITV | industrial TV system |
| IV電線 | indoor PVC insulated wire |
| i-x線図 | i-x chart |
| I動作 | integral action |
