What does Ifs stand for?

Independent Front Suspension

ICOT Free Software (SAUS)

Identification, Friend or Foe, Switching Circuit - Military

Inactivated Fetal-Calf Serum - Immunology

In-Band Framing System - Simulation Laboratories, Inc.

Increased Forward Stocking - Military (DNAB)

Independent Fiduciary Services, Inc. - Commercial firm

Independent Front Suspension - Automotive engineering

Indian Forest Service - British

Indirect Fire Simulator (SAUS)

Industrial & Financial Systems (EFIS)

Inertia Fuel Shutoff (HAWK)

In-Flight Safety

Inflight Survey - USTTA (TAG)

Information Fatigue Symdrome (WDAA)

Information Flow Standards (KSC)

Information Flow System (SAUS)

Infrared Frequency Synthesis

Innovative Fulfillment Solutions, L.L.C. - Commercial firm

Input Factor Storage (SAUS)

Inshore Fire Support Ship - Later, LFR

Insignia Financial Group - NYSE symbol (SAG)

Inspectorate of Flight Safety (SAUS)

Installable File System - Computer science

Institute for Families in Society - University of South Carolina (RCD)

Institute for Fiscal Studies - British

Institute of Financial Services - Australia

Institute of Flight Structures - Columbia University

Institute of Fusion Studies (SAUS)

Instructions for Service

Instrumentation Field Station (SAUO)

Instrument Fact Sheets (SAUO)

Instrument Flight Simulator (MCD)

Instrument Flight System (SAUS)

Instrument Right Simulator (SAUS)

Integral Field Spectrometer

Integrated Facilities System - Army

Integrated File System (SAUS)

Integrated Financial System (SAUS)

Integrated Flight System

Integrated Forest Study on the Effects of Atmospheric Deposition (SAUO)

Intelligent Fax System (SAUS)

Intelligent File Store - British

Intelligent Fixturing System (VLIE)

Interactive File Sharing

Interactive Flow Simulator (TEL)

Interchange File Separator - Computer science (BUR)

Interdivisional Facilities Standard (SAUS)

Interface Specification

Inter Frame Space (SAUS)

Interframe Space (SAUS)

Intermediate Frequency Stage (SAUS)

Intermediate Frequency Strip

Internal Field Separator (SAUO)

Internal File System - Computer science (VLIE)

Internal Focus Sensor (PDAA)

International Faculty of Sciences (SAUO)

International Federation of Settlements and Neighbourhood Centers (EAIO)

International Federation of Ski (SAUO)

International Federation of Surveyors - See also FIG (EAIO)

International Fertilizer Supply Scheme (SAUO)

International Film Seminars (EA)

International Flower Service (SAUO)

International Fluidics Services (SAUS)

International Flying Services SRL - Italy - ICAO designator (FAAC)

International Focus Resources, Inc. - Vancouver Stock Exchange symbol

International Foodservice Systems, Inc. (EFIS)

International Foundation for/of Science (SAUO)

International Foundation for Science - See also FIS - ICSU - Stockholm, Sweden (EAIO)

International Foundation for Stutterers (EA)

International Frankenstein Society (EA)

International Freephone Service (SAUS)

International Freight Services (SAUO)

Internationella Forsurningssekretariatet - International Secretariat on Acid Rain - Sweden (EAIO)

Interrelated Flow Simulation

Interstitial Fluid Space - Medicine (DMAA)

Interstitial-Free Steel - Metallurgy

Investment Feasibility Studies (TEL)

Ionospheric Forward Scatter (TEL)

Irish Free State - Later, Republic of Ireland

Iron Fortified Common Salt - Nutrition

Iterated Function System - Computer science (BYTE)

Sun-Fox Inc., Apple Valley, MN - Manufacturer code for watercraft hull identification number (USCG)