| Acronym | Sense | Language | Topics |
|---|---|---|---|
| IG | Inertial Guidance | In English | → Vehicle engineering |
| IG | Inner Gimbal | In English | → Astronautics |
| IG | Instrument Ground | In English | |
| IG | Instrumentation Group | In English | |
| IG | Internal Guidance | In English | |
| IG | Índice glicêmico = GI | Glycemic Index | In English = GI | Glykemický index | In Czech = GI | Glykæmisk indeks | In Danish = GI | Glykämischer Index | In German = GI | Glükeemiline indeks | In Estonian = GI | Glykeeminen indeksi | In Finnish = ГИ | Гликемијски индекс | In Serbian = GI | Glisemik indeks | In Turkish |
In Portuguese | → Nutrition → Food technology |
| IG | Inscriptiones Graecae | In Latin | → Serial publications, periodicals → Archeology |
| IG | International Gesture | In English | → Linguistics |