| IFF | Bitmap graphics or sound (Amiga IFF/8SVX Interchange File Format) 
| Others |
| IFF | Commodore Amiga Image format
| Others |
| IFF | I Ff Ff
| Others |
| IFF | Identification Friend or Foe
| Military, Air Force, Army, Defence, Marine Corps, Navy, Weapon, Technology |
| IFF | Identify Friend Or French
| Others |
| IFF | If and only if
| Others |
| IFF | Iffley, Queensland, Australia
| Others |
| IFF | Illinois Facilities Fund
| Others |
| IFF | Image File Format
| Others |
| IFF | Indentifier Friend Or Foe
| Others |
| IFF | Independent Film Festival
| Others |
| IFF | Independent Financial Freedom
| Others |
| IFF | Independent Friendly Fire
| Others |
| IFF | Industrial Fabrics Foundation
| Others |
| IFF | Industrial Funding Fee
| Others |
| IFF | Information Flow Framework
| Others |
| IFF | Information Fun and Friendship
| Others |
| IFF | Institute for Families
| Others |
| IFF | Institute For Figuring
| Others |
| IFF | Instituto Federal Fluminense
| Others |
| IFF | Integral Force Feedback
| Others |
| IFF | Integrated Financial Forecast
| Others |
| IFF | Interactive Fan Fiction
| Others |
| IFF | Interchange File Format
| Others |
| IFF | Interchange Format Files
| Others |
| IFF | Interchangeable File Format
| Others |
| IFF | Internal Format File
| Others |
| IFF | Internationa Flavors Fragranc
| Others |
| IFF | International Feldenkrais Federation
| Others |
| IFF | International Festival Forum
| Others |
| IFF | International Film Festival
| Others |
| IFF | International Flavors and Fragrances
| Others |
| IFF | International Flexwork Forum
| Others |
| IFF | International Floorball Federation
| Others |
| IFF | International Footwear Federation
| Others |
| IFF | International Format File
| Others |
| IFF | International Friendship Fair
| Others |
| IFF | International Fur Federation
| Others |
| IFF | International Futures Forum
| Others |
| IFF | Internet Freedom Festival
| Others |
| IFF | Internet Freedom Forum
| Others |
| IFF | Internet Freedom Foundation
| Others |
| IFF | Interrupt Flip Flop
| Others |
| IFF | Investment Funding Futures
| Others |
| IFF | Irish Footie Follower
| Others |
| IFF | Issued For Fabrication
| Others |
| IFF | Sun TAAC Image File Format Bitmap graphics
| Others |