IFS may refer to:

• Industrial and Financial Systems (IFS AB), a Swedish company and creator of enterprise software
• International Film Service, a short-lived animation studio owned by Hearst Communication.

• Iterated function system, a method of constructing fractals in mathematics and computer science
• Internal field separator, a special set of characters in Unix shells
• Interference (intensity) fluctuation spectroscopy, related to dynamic light scattering
• Interframe spacing, a pause which may be required between network packets or network frames
• Installable File System, a filesystem API in IBM OS/2 and Microsoft Windows NT
• InfoPath Forms Services, a component of SharePoint Server that allows Microsoft Office InfoPath forms to be hosted in a SharePoint web site and serve and fill them using a browser-based interface

• Irish Free State, a state in Ireland which existed in the early part of the 20th century
• Ifs, Calvados, a commune of the département of Calvados, in the Normandie région, in France

• Indian Foreign Service, Diplomatic Service of the Government of India
• Indian Forest Service, All India Services of the Government of India

• ifs University College, a UK-based, non profit making body providing financial education
• Institut für Sexualwissenschaft
• Institute for Fiscal Studies, a UK-based independent economic research institute
• Institutt for Forsvarsstudier, the Norwegian Institute for Defence Studies
• Institut für Sozialforschung, the University of Frankfurt Institute for Social Research
• International Foundation for Science
• International French School Singapore
• International Futures
• International Sumo Federation
• Internationale Filmschule Köln, a filmschool in Cologne, Germany
• Islamic Foundation School

• Integral field spectroscopy, a technique for astronomical observations
• Integrated Forecast System a global meteorological model developed by European Centre for Medium-Range Weather Forecasts
• Isoflavonoid synthase, an enzyme

• Independent Front Suspension, an early type of front-end independent suspension on many passenger vehicles
• Initial Flight Screening, flight screening used as a prerequisite for Air Force Flight School
• Intelligent Front-lighting System is a technology to ensure the visibility of the driver on the road ahead without blinding oncoming drivers with the partial light control capability.

• Internal Family Systems Model, a school of psychotherapy
• International Financial Statistics, a database maintained by the International Monetary Fund
• A retired US Navy hull classification symbol: Inshore fire support ship (IFS)

This disambiguation page lists articles associated with the title IFS.
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