If
if or IF may be:
- Conditional word; see also Control flow.
- If (movie)
- If ÃÂ, poem by Rudyard Kipling
- If magazine, aka Worlds of If, a science fiction magazine published from the 1950s until 1974, when it merged with Galaxy science fiction.
- If (song), by the American pop group Bread
- Impact Factor
- Interactive fiction (IF, also known as text adventures)
- Intermediate frequency
- Intermediate filament
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