| Term | Full Form | Category |
|---|---|---|
| I&N | Infiniti and Nissan![]() | Company, Transport |
| I.N | Independent Nation![]() | Country |
| IN | a Batch command intended to precede a [set] argument | Others |
| IN | Air Force Component Intelligence Officer | Others |
| IN | Imperishable Night | Others |
| IN | Impulse Noise | Others |
| IN | Inch | Others |
| IN | Inch or Inches | Others |
| IN | Inches | Others |
| IN | India![]() | Country |
| IN | India![]() | Internet, TLD |
| IN | Indian Navy![]() | Government, Military, Defence, Marine Corps, Navy, Transport, Water Transport |
| IN | Indiana![]() | State |
| IN | Indiana Northeastern Railroad | Others |
| IN | Indiana Northeastern Railroad Company | Others |
| IN | Indium![]() | Element |
| IN | Indonesian | Others |
| IN | Infantry | Others |
| IN | Influence Net | Others |
| IN | Information Need | Others |
| IN | Information Systems Directorate | Others |
| IN | Infraction Non-Traffic | Others |
| IN | INlet | Others |
| In | Input | Others |
| IN | Input Byte or Word | Others |
| IN | Instructor | Others |
| IN | Instrument Specialties | Others |
| IN | Intelligent Network | Others |
| IN | intranasal | Others |
| IN | iOS Android | Others |
| IN | Ir Numbers | Others |
| IN | LinkedIn | Others |
| IN$ | Installation file (HP NewWave) | Others |