LEM may refer to:
- La Crosse Emulated Machine, a Java-based virtual machine developed at the University of Wisconsin–La Crosse
- Lake Erie Monsters, a minor professional ice hockey team based in Cleveland, OH
- Lamina emergent mechanism
- Law of excluded middle, a law in logics or rhetorics
- Learnable Evolution Model, an evolutionary computation method
- LEM, a brand name of Generalmusic
- LEM domain-containing protein 3, a membrane protein associated with laminopathies
- Liquid Elastomer Molding (LEM), a gasket technology developed by the Federal-Mogul Corporation
- Lunar Efficient Missionary, a fictional space ship in Stanisław Lem's novel Peace on Earth
- "Lunar Excursion Module", an early name of the Apollo Lunar Module
- National Rail station code for the Leyton Midland Road railway station, United Kingdom
- SIL code for Nomaande, a language of Cameroon
- Lay Eucharistic Minister, a lay person authorized to the distribute Communion in Catholic, Episcopal or Lutheran Churches.
See also
- All pages beginning with "LEM"
- Lem (disambiguation)