2S

2S or 2s may refer to:

Science

• 2s electron in an atomic orbital
• 2S, a protein-folding intermediate with two disulphide bonds

Transportation

• 2S gondola lift
• 2S, a series of Toyota S engines
• Birdman Chinook 2S, ultralight aircraft
• Southwind Airlines (IATA code), a Turkish airline

Other uses

• Two-spirit, a term used by some indigenous North Americans to describe certain people in their communities who fulfill a traditional third-gender (or other gender-variant) ceremonial role in their cultures
• IIS, a draft status abbreviation for conscription into the United States armed forces

See also

• 2 (disambiguation)
• S2 (disambiguation)