SLO, or Slo, may refer to: Places. San Luis Obispo, a city in the state of California, US. San Luis Obispo County, a county in the state of California, US. San Luis Obispo Coast / SLO Coast viticultural area in San Luis Obispo County, California, US. Medicine. Scanning laser ophthalmoscopy, an eye examination method. Secondary lymphoid organ, for example a lymph node or spleen. Streptolysin O, exotoxin produced by streptococci. Transport. Salem–Leckrone Airport (IATA code), Illinois, US. Slough railway station (National Rail code), in the county of Berkshire, UK.
https://en.wikipedia.org/wiki/SLO