Inf or INF may refer to:

Look up inf in Wiktionary, the free dictionary.

• INF file, a file extension (information file) used by software and hardware driver installation routines
• INF help file, a binary help file created after compiling IPF help source with IBM or Open Watcom's help compiler.
• Informatics (academic field), the science of information and the practice of information processing

• Infinity, referring to something without any limit
• Infimum, the greatest lower bound of a subset of a partially ordered set

• Intermediate-Range Nuclear Forces Treaty, a 1987 arms control treaty between the United States and the Soviet Union
• International Naturist Federation, the global umbrella organisation representing official national naturist societies
• International Netball Federation, the international governing body for the sport of netball
• Irish National Federation, a nationalist political party in Ireland 1891–1900

• In Guezzam Airport, Algeria
• INF Clairefontaine, France national football team centre

• Inferior, an anatomical terms of location

• Inflammation, part of the immune response to tissue damage or infection

• Infantry, land based soldiers who are specifically trained for the role of fighting on foot

• Issey Nakajima-Farran, Canadian soccer player

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