| Acronym | Definition |
|---|
| IFSR➣Iranian Financial Sanctions Regulations (US Treasury) |
| IFSR➣International Federation for Systems Research |
| IFSR➣Interpolating Force-Sensitive Resistance (electronics) |
| IFSR➣Insurance Financial Strength Rating (Moody's Investors Service) |
| IFSR➣International Fellowship of Scouting Rotarians (est. 1991; Rotary Club) |
| IFSR➣Integrated Flight Software Requirement |
| IFSR➣In-Flight Status Report |