LER

• Larry LaLonde, nicknamed "Ler", guitarist of the rock band Primus
• Anthony Ler, Singaporean notorious murderer

• Ler, Norway, a village in the municipality of Melhus in Trøndelag county, Norway
• Ler, South Sudan, a village in the north central part of South Sudan
• Leytonstone High Road railway station, a station in London, England
• Leinster Airport, IATA airport code "LER"
• London Electric Railway, later part of the London Underground

• Label edge router, a term used to define an edge-most router in an IP/MPLS network
• Light-emitting resistor, the working principle of an incandescent light bulb
• Liquid epoxy resin, a precursor to coatings and flooring material
• Locus of enterocyte effacement-encoded regulator, a regulatory protein in pathogenic bacteria
• Luminous efficacy of radiation, for light sources, the ratio of luminous flux to power
• Lunar Electric Rover, a vehicle designed by NASA for extra-vehicular activity on the lunar surface.
• Land equivalent ratio, in multicropping or intercropping agriculture, the relative land area needed for the same yield under equivalent disjoint monocultures

• "Ler" books, a trilogy by M. A. Foster
• Loss Exchange Ratio, a military calculation of comparative casualties of war
• The Loyal Edmonton Regiment, an infantry unit of the Army Reserve Canadian Forces
• Elite One Championship (French: Ligue Élite de Rugby), a French rugby league
• Ler (mythology), a sea god in Irish mythology also known as Lir

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