- REM. is an acronym for rapid eye movement.
- R.E.M. is also the name of a United States rock band, formed in Athens, Georgia in 1980. See R.E.M. (band)
- A rem is a unit for measuring levels of exposure to radiation.
- REM is a command in the BASIC programming language, short for remark or reminder and used to preface a comment.
- REM is also the acronym for Rosicrucian Egyptian Museum.
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