LK
- LK – (s) Sri Lanka (ISO 3166 digram)
- LKA – (s) Sri Lanka (ISO 3166 trigram)
- LKL – (i) Lietuvos krepšinio lyga (Lithuanian, "Lithuanian Basketball League")
- LKR – (s) Sri Lanka rupee (ISO 4217 currency code)
- LKR4 – (s) Linkwitz-Riley 4th order (audio crossover type)
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