93 IFS definitions

Installable File System 
Inertia Fuel Shutoff 
ionospheric forward scatter 
Installable File Systems 
Integrated File System 
International Freephone Service 
Integrated Facilities System 
Internet File System 
Independent Front Suspension 
Indian Foreign Service 
Indian Forest Service 
Information File Separator 
Inheriting File System 
Initial Flight Screening 
Installable File System Manager 
Institute of Fiscal Studies 
Integrated financial system 
Integrated Flight Simulator 
Integrated Fluid Servicer 
INTERACTIVE FILE SHARING 
interframe space 
International financial statistics 
International Foundation for Science 
Internet File Server 
interstitial fluid space 
iterated function system 
ICOT Free Software 
Ifosfamide 
Image File System 
Imagery File Server