Transportation
- Sriwijaya Air (ICAO code: SJY), an Indonesia-based low-cost airline
- SJ AB (English: Swedish State Railways), a former public transport limited company owned by the Swedish government, formed from the old (Statens Järnvägar), that disbanded in 2001
- SuperJet, a personal water craft produced by Yamaha Motors
- Suzuki SJ 410 or 413, part of the Suzuki Jimny series
- Jeep Cherokee (SJ) 1974-1983
- Jeep SJ platform
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