S5

S5 or S-5 may refer to:

Science

 * Pentasulfur (S5), an allotrope of sulfur
 * S5, the symmetric group on five elements
 * S5: Keep contents under ... (appropriate liquid to be specified by the manufacturer), a safety phrase in chemistry
 * Sacral spinal nerve 5, a spinal nerve of the sacral segment
 * S5, the fifth sacral vertebra of the vertebral column, in human anatomy

Electronics

 * Canon PowerShot S5 IS, a 2007 8.0 megapixel bridge digital camera
 * Coolpix S5, a 6 Megapixels Nikon Coolpix series digital camera
 * FinePix S5 Pro, a 2006 digital single lens reflex camera by Fujifilm
 * Samsung Galaxy S5, an Android smartphone by Samsung
 * Samsung Galaxy Tab S5e, an Android tablet
 * Simatic S5 PLC, a programmable logic controller family by Siemens

Software

 * S5 (file format), for defining slideshows
 * ACPI S5 power state, of the Advanced Configuration and Power Interface in computing

Airlines and airports

 * Shuttle America (IATA airline code: S5)
 * Trast Aero, (IATA airline code: S5)
 * Bandon State Airport (FAA code: S05)
 * Slovenia, International Aircraft Registration Prefixes (ICAO country code: S5)

Mass-transit lines
S-Bahn
 * S5 (Berlin)
 * S5 (Munich)
 * S5 (Nuremberg)
 * S5 (RER Vaud), an S-Bahn line in Switzerland
 * S5 (Rhine-Main S-Bahn)
 * S5 (Rhine-Ruhr S-Bahn)
 * S5 (St. Gallen S-Bahn), an S-Bahn line in Switzerland
 * S5 (ZVV), in the cantons of Zürich, St. Gallen and Schwyz in Switzerland
 * S5, a Hanover S-Bahn line
 * S5, a Stuttgart S-Bahn line
 * An alternate name for the Huairou–Miyun line in Beijing

Other lines
 * S5, a Stadtbahn Karlsruhe line, Germany
 * FGC line S5, a suburban train line in Barcelona Province, Spain

Roads

 * County Route S5 (California), a county route in California, U.S.
 * S5 Shanghai–Jiading Expressway in Shanghai, China

Vehicles
Aircraft Automobiles Spacecraft Trains Watercraft
 * Rans S-5 Coyote, an ultralight aircraft
 * Sikorsky S-5, Igor Sikorsky's first successful aircraft design
 * Supermarine S.5, a 1920s British single-engined single-seat racing seaplane
 * Audi S5, a German compact executive sports car
 * BYD Song, a Chinese compact SUV known as the BYD S5 in Egypt
 * Haima S5, a Chinese compact SUV
 * Haima S5 Young, a Chinese subcompact SUV
 * Huansu S5, a Chinese compact SUV
 * JAC Refine S5, a Chinese compact SUV
 * Luxgen S5, a Taiwanese compact sedan
 * Saturn V, the rocket used mostly in the Apollo program
 * ALCO S-5, and American diesel switching (shunting) locomotive
 * Prussian S 5, an 1894 steam locomotives class; see List of Prussian locomotives and railbuses
 * Supermarine S.5, a 1920s British single-engined single-seat racing seaplane
 * USS S-5 (SS-110), a 1919 S-class submarine of the United States Navy

Other uses

 * S5 (modal logic), in logic and philosophy
 * S-5 rocket
 * S5 (band), an Indian pop band
 * S5 (classification), a disability swimming classification
 * British NVC community S5, a swamps and tall-herb fens community in the British National Vegetation Classification system
 * Fifth year, in the Scottish education system
 * S5, a public affairs officer within military units; see staff
 * S5 postcode, in the S postcode area covering areas of northern Sheffield
 * S-5 visa, a non-immigrant visa which allows travel to United States for individuals who are witnesses, informants