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Abkürzung-Kategorie: i
| Abkürzung | Langform |
| IAN | Integrated Access Node |
| IANA | Internet Assigned Numbers Authority |
| IAOG | International Administrative Management Domains Operators Group |
| IAP | ISDN Access Internetworking Profile |
| IAR | Institut für Automation und Robotik |
| IARP | International Amateur Radio Permission |
| IARU | International Amateur Radio Union |
| IAS | International Accounting Standard |
| IAS | Information Access System |
| IASG | Internet Addiction Support Group |
| IASNET | Institute for Automated Systems Network |
| IASS | Internet Alphaserver System Software |
| IAT | Inlet Air Temperature sensor |
| IAT | Import Address Table |
| IATA | International Air Transport Association |
| IATS | Intake Air Temperature Sensor |
| IAUG | International AIX Users Group |
| IAV | Ingenieurgeselschaft Auto und Verkehr |
| IAX | Inter-Asterisk Exchange Protocol |
| IB | Intelligent Backtracking |
| IB | In Betrieb |
| IBA | Independent Broadcasting Authority |
| IBAC | In Band Adjacent Channel |
| IBAN | International Bank Account Number |
| IBC | Illinois Benedictine College (Gutenberg-Projekt) |
| IBC | International Broadcasting Convention |
| IBC | Inter Base Component |
| IBCN | Integrated Broadband Communication Network |
| IBCS1 | Intel Binary Compatibility Specification Edition 1 |
| IBDWT | Irrational Based Discrete Weighted Transform |
| IBFD | Interessengemeinschaft Blinder Funkamateure Deutschlands |
| IBIA | International Biometric Industry Association |
| IBL | Input Buffer Limit |
| IBM | International Business Machines (Big Blue) |
| IBN | International Booking Network |
| IBO | Inter Base Object |
| IBOC | In Band On Channel |
| IBOND | Intelligent Business On Demand |
| IBRD | Internationale Bank für Wiederaufbau und Entwicklung (der UNO) |
| IBRD | Internationale Bank für Wiederaufbau und Entwicklung |
| IBS | Intelligenter Batterie Sensor |
| IBS | Integriertes Banken-System |
| IBS | Intelsat Business Services |
| IBSS | Independent Basic Service Set |
| IBT | Internet Based Training |
| IBU | Informationsverbund Buchhandel |
| IC | Interrupt Controller |
| IC | Instruction Cache |
| IC | Input/Integrated Circuit |
| IC | Integrated Circuit |