Im or Im
- Instant messaging, a form of real-time communication online using typed text
- .im, an Internet country code for the Isle of Man
- Im (giant), a giant in Norse mythology
- Im (Korean name)
- Im, a Cantonese romanization for the surname Yan.
- Im, a subtype of irregular galaxy
- Im, the imaginary part of a complex number in mathematics
- im, the Image of a function in mathematics
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