SK may refer to:
People
- SK (actor) or Sivakarthikeyan, Indian actor
- Salman Khan or SK, Indian actor
- Shahram Kashani (SK), an Iranian-American singer
- Shakib Khan, Bangladeshi film actor, known by the initialism SK
- Søren Kierkegaard, Danish philosopher and theologian
Businesses and organizations
- SK Foods, an American agribusiness company
- SK Hand Tools, an American tool manufacturer
- Sangguniang Kabataan, Philippines youth councils
- SK Group, South Korean conglomerate
- Scandinavian Airlines (IATA code SK)
- Silicon Knights, a Canadian video game developer
Places
Slovakia
- Slovakia (ISO country code)
- ISO 3166-2:SK, codes for the regions of Slovakia
- .sk, the internet country code top-level domain for Slovakia
- Slovak koruna, a former currency of Slovakia
- Slovak language (ISO 639-1 language code "sk")
Other
- sk. sokak, Turkish postal abbreviation
- South Korea, an Asian country
- Saskatchewan, a Canadian province by postal abbreviation
- Sikkim, a state in northeastern India (ISO 3166-2 code)
- Kingdom of Sikkim, a former monarchy in South Asia (ISO 3166-1 alpha-2 code: SK, now deprecated), an Indian protectorate merged with it as a state in 1975
- Svidník, Slovakia, vehicle plates
- Sisak, vehicle plate for city in Croatia
- South Kingstown, Rhode Island, a United States town
Science and technology
- sk (unit) (Skot), an old and deprecated unit of measurement for dark luminance
- SK (people mover), a vehicle
- SK calculus, an alternate form of SKI combinator calculus
- SK radar, an American air-search radar used during World War II
- Silent key, an amateur radio operator who has died
- "Stop keying", a prosign used in Morse code
- Super-Kamiokande, a Japanese neutrino detector
Biology
- SK channel, small conductance calcium-activated potassium channels, a family of ion channels
Medicine
- Solar keratosis or senile keratosis
- Streptokinase, a bacterial enzyme used in the treatment of blood clots
Sport
- SK Gaming, an electronic sports team
Other uses
- Regulation S-K, regarding financial statements in the United States
- Sekolah Kebangsaan, a type of school in Malaysia
- Storekeeper, a naval rating in the United States Navy
- Senran Kagura (SK), video game series
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