SLO

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
 * SLO Transit, a provider of mass transportation in San Luis Obispo, California, US
 * Solo Balapan railway station, a railway station in Indonesia (station code)

Other uses

 * Service-level objective, of a customer agreement
 * SLO, a music album by Jess Mills
 * Slovakia, UNDP country code
 * Slovenia, IOC country code
 * Student Learning Objectives, an assessment tool used by teachers
 * Supporter liaison officer, of a sports club