REM is an acronym for:

• Rapid eye movement, a phase in sleep
• Rosicrucian Egyptian Museum, a museum about ancient Egypt
• Röntgen equivalent man, a unit for measuring levels of exposure to radiation

REM may also refer to:

• R.E.M. (band), an American rock music band formed in Athens, Georgia in 1980
• REM island, home of 1964 pirate Radio and TV Noordzee off the Dutch coastline.
• REM programming language command, short for remark or reminder, used to preface a comment in both BASIC and DOS
• Remy Shand (REM), a Canadian R&B artist
• Rem Koolhaas, a Dutch architect
• REM, an insult used if someone is acting like they have no common sense.

REM | REM | REM | 렘 | R.E.M. | REM | REM | REM | REM (kthjellim) | REM